the pliocene and later faunas . the kw anto region in japan

PALAEONTOLOGICAL SOCIETY OF JAPAN
SPECIAL PAPERS
NUMBER 2
Matajiro YOKOYAMA'S
THE PLIOCENE AND LATER FAUNAS
FROM
. THE KW ANTO REGION
IN JAPAN
Revised by
Isao TAKI and Katsura OYAMA
PUBLISHED BY THE SOCIETY
March 1, 1954

Special Papers, Palaeontological Society of Japan
Number 1. (Issued September 25, 1951)
Bibliography of Japanese Palaeontology and Related Sciences,
1941-1950 '" ... ... ... '" ...... ...... ... .. ...... .... , . ... ......... .................. ...... Riuji ENDO
Transactions and Proceedings of the Palaeontological Society of Japan
New Series, No.4 (Issued November 30, 1951)
206. Fossil Diatoms found in the Kayama Clay-shale on the Outskirts of Kanazawa City
..... Wataru ICHIKAWA
?,07. Discovery of Erect Stumps of X enoxylon laliporosum in the Jurassic T etori Series
in Japan .. .. . .. .. .... .. . Yuzuru OGU RA, T eiichi KOBAYASHI and Shiro MAEDA
208. Stratigraphical and Palaeontological Studies of the Later Palaeozoic Calcareous
Algae in Japan I. Several New Species of the Sakamotozawa, Hikor oichi-mura, Kesengun,
in Kitakami Mountainous Land ...... ..... ............. .. ... Ryuji E NDO
New Series No.5 (Issued February 15, 1952)
209. On the Mutation of Fossil Glycimeris rotunda ...... .. .. ........ .......... . .liro M AKIYAMA
210. Stratigraphical and P dlaeontological Studies of the Later Palaeozoic Calcareous
Algae in Jap:m II. Several previously described Species from the Sakamotozawa
Section, Hikoroichi-mura, Kesen·gun, in the Kitakami Mountainous Land ... .......... . .
....... .. .... . .......... Ryuji ENDO
211. On the Mansuyia and the T sinanidae ...... .. .... ........ .. .............. ... T eiichi KOBAYASH I
212. Permian Microfossils in the Dodo Conglomerate of the Yasuba-Type ... .......... .... .
.. ............... .... ......... ... .................... .. .. .. ... . ... ...... ...... ... .. ......... ... .. .. Kenji KO NISHI
New Series No. 6 (Issued May 31, 1952)
213. On SQme Species of Cyclina from Japan and Korea ............... .. . Yasuhiko KAMADA
214. T wo New Triassic Estherians from Province of Nagato in West Ja pan .. ....... ... ..... .
.. . . _ ... ...... _ ............... .............. .. ...... .. .. .... .. .... ...... .. .. _ ....... .. .... .. . T eiichi KOBAYASHI
215. A Miocene Crab, Hyas tsuclzidai, n. sp. from the Wakkanai for mation of Teshio
Province, Hokkaido ... .. .... .. .. ..... .. ............... ....... ... ... .. .... ... ...... ..... Rikizo IMAIZUMI
216. De3cription of the Palaeogene Molluscs from Sakito, Nagasaki Prefecture, Jap:ll1 ... .. .
... ... .. . ... ... ... .. . .. .... ... ...... .. .... ... .. ....... ... ..... .... ...... ... ......... ......... Atsuyuki MIZUNO
New Series No. 7 ( Issued August 31, 1952)
217. An Interesting Ralation between Stomatorbina DORREEN, 1948 and Mississippina
HOWE, 1930 of Foraminifera ... ... .. .. ..... .... .... ... .. .. .... .................. T akayasu UCHIO
218. A Miocene Crab, Tymolus Ka madai, n . sp. from the Numanouchi Formation of the
Joban Coal-field ... .. ...... ....... ............ .. ......... .. ................. ..... ... .... Rikizo IMAIZUMI
219. The Discovery of New Miocene F auna in the Northern Part of Nishitagawa Coalfield,
Yamagata Prefecture, Japan ... ...... Kenzo OGASAW ARA and T oshimasa T ANAI
220. T erabratalia C?) innaiensis (HAYASAKA) from Iwate Prefecture. Japan .. ............... .
... .. ... ... ..... ........... ............ .. ... .... ... ..... ... .... .. .... .... .. ... .. ............ .... Ichiro HAYASAKA
221. Occurrence of Gymnocodiu m, a Permian Alga, in Japan .. .. .. .. ......... . Kenji KO NISHI
New Series No.8 (I'isued October 31, 1952)
222. A fossil Palm im Kenrok u P ark at Kanazawa .. .... ....... .. .. ............ . Yudzuru OGURA
223. Notes a propos de quelques plantes fossiles dans Ie Groupe d'Ennichi (Yongil), du
Coree meridionale 1. ..... . .. ................. ... .... .. .. ..... ... ..... Toshimasa T ANAL

Introductory Remarks
1. The numbering of the figures in the plates is t he sa me as in the original paper.
2. However, the pla tes a re numbered according to the arrangement of the new
compilation at the right upper corner of the plate with the original number at the
left upper corner.
3. The t itle of each paper is printed below each plate.
4. The foll owing marks a re used a t the head of YOKOYAMA'S names to indicate the
connections with the revised names:
/ showing misidentified species which is referable t o the known species, then
YOKOYAM A'S name is not regarded as a synonym of the species. For example,
Valvula acuminata (pI. 2, fig. 2) is not the species of BRUGUIERE, but it is
Volvurella Joadiola ( A. ADAMS ).
'* misidentified species which is not referable to a ny other species, then that is a
new species. For example, the species shown in pI. 2, fig. 17 is not referable to
Pleurotoma lwmakurana P ILSB RY a nd any other species, then it is a new species,
Cryptogemma yolwyamai OYAMA.
YOKOYAMA'S name is a synonym of the revised na me, being named already by
another author. For example, Cylichna sibaensis YOKOYAMA (pl. 2, fig. 6) has
been na med by A. AD AMS as C. phialus, then the former is the synonym of the
latter.
new name for YOKOYAMA'S name which is preoccupied by the another species, i. e.
a homonym of t he a nother species. For example, Comes tuberculatus was named
by D UJAR Dl N before YOKO YAMA, to whose name T OM LI N proposed C. tuberculosus
(pl. 2, fig. 15).
5. The following ma rks are used next to the scientific name to show the habitat
in the systematic index.
Land
Spr.
N,
No
Nl
N2
N3
N4
B.
Land shell.
Spray zone.
Shallow sea province.
Tidal zone.
Euneritic zone, from the lowest tide mark to 30 m in depth.
Mesoneritic zone, 30-60 m .
Subneritic zone, 60-120 m.
Bathyneritic zone, 100-250 m, continental shelf.
Bathyal zone, 250- 1200 m.
Fr. W. Fresh water.
Br. W. Brackish water.
W d. living in t he wood.
6. Do. same as the preceding name.
7. The generic a nd subgeneric name is a bbreviated by using the first letter because
the same names are continued succesively in the expla nation.

· - 52-
Descriptions of new genera, subgenus and species.
Katsura OYAMA
Genus Rissoalaba OYAMA, n. gen.
Type: Rissoa (Cingula) plebeja YOKOYAMA, 1922
Shell small, turrete; whorls about nine; embryonal whorls very small; suc­
ceedings more or less angulate near the suture like Turritellas; sculpture consi&ts
of faint spiral striae; aperture ovate; outer lip simple, smooth within.
Genus Rissoina D'ORBIGNY
Subgenus Rissoinella OYAMA, n. subg.
Type: Rissoina zeltenerioides YOKOYAMA, 1920
Shell very smaII, white; whorls moderately rounded; axial ribs oblique, obsolete;
no spiral sculpture; aperture moderately large, broadlY oval; parietal wall covered
with a callus, which fuses with the outer lip and the columella.
Bittilltn yokosukense OYAMA, nom. nov.
1920 Bittium perpusillum TRYON-YoKOYAMA, Foss. Miura etc., p. 67 [ex. lit.]
Bittium perpusi/lum TRYON (B. pusillum DUNKER, non GOULD) and Cerithiopsis
satomii YOKOYAMA, 1924, are syr.onyms of B. glareosum GOULD, while B. perpusillum
illustrated by YOKOYAMA differs from B. glareosum GOULD by shape and sculpture.
Genus HoraiclaVlls OYAMA, n. gen.
Type: Mangilia splendida A. ADAMS, Proc. Zoo1. Soc., 1867, p. 309.
Shell turrete, like Elaeocyma; whorls somewhat inflated, with axial ribs; aper­
ture ovate, without distinct sinus both on anterior and posterior sides.
This new genus differs from other genera of the subfamily Clavinae in lacking
a distinct posterior sinu.s.
Lllcina stearnsiana OYAMA, nom. nov.
1895 Loripes bialata-PILSBRY, Cat. Mar. Moll. Japan, p. 133-134, pI. III, figs. 13, 14.
PH.SBRY'S shell belongs to Ludna (=Anodontia), but that name is preoccupied
by Lucina bialata SEGUENZA. Here the author introduces a new specific name.

A. tubereulosus ........................ 2-15, 16
Assiminea japoniea ......... '" .................... 48-9
Astarte borealis .................................... 30-11
A. hakodatensis ........................... 12-5, 6
Astracmea heroldi ................................. 45-4
Astraea haematraga .............................. 39-7
Astralium haematragus ........................... 39-7
Atilia burchardi ... .......... " ....................... .4-7
A. masakadoi .................................... 22-23
A. praecursor .................................... 22-25
A. pllmila ....................................... 43-10
A. smithi .......................................... 22-24.
A. turriculala ... ................................. 22-22
Atrina peclinata japonica ........................ 35-8
AustrotroPhon candelabrttm ...... 4-2; 7--13, 14;
23-2
A. xestra nipPoniclls ........................ 4-13, 14
Azorillus abbreviatlls ....................... 8-12, 13
B
Babylonia japonica ............................. 22-20
Balcis glabroides ................................. 24-23
B. krishna ...... ................................. 24-24.
B.
B.
B.
B.
sagamiana .................................... 6-8
shibana ....................................... 44-8
tokunagai .................................... 24-22
yokosukensis ................................. 6-7
Barbatia bicolorata ... ..................... 1-8, 42-13
B. domingensis .............................. 42-6
B. fusca ................................... .42-13
B. stearnsii ............................. .40-5, 6
B. tenebrica ................................. 42-7
B. sp .......................................... 17-9
Barbilonia arthritica .............................. 3-12
Barnea inornata .................................... 7-29
Basilisa? laeviuscula .............................. 25-24
Basterotia gouldii ........................ 8-7, 40-2, 3
B. trapezium .......................... 8-8, 9
Bathymllrex echinus ........................ 4-21-26
Batillaria multiformis .............................. 5-9
B. zonalis ................................. 42-18
BatillTls cornulus ................................. 38-22
Bedevina birileffi .................................... 23-1
Bela retieosiulata ................................. 21-38
B. mgulata var. schneideri ............... 21-37
B.? glabra ............ ................................. 3-1
BellasPira semicarinata ........................... 2-24
Bembix convexiusculus ........................... 8-32
B. crumpi ................................. 6-27, 28
- 54-
Benthovoluta hil gendorfi ....................... 3-16
Beringius adelphicus ................................. 4-1
B. pericoch/ion ........................... 22-13
Besla bic/netella .................................... 44-17
B. shibana ....................................... 44-13
Bittium acutangulum .............................. 38-7
B. alutaceum ........................... 38-8, 13
B. binodulosum ." .............................. 5-8
13. glareosum ................................ 38-23
B. numamuranum ........................ 38-13
B. jJerpusillllm .............................. 5-13
B. yokosukense .............................. 5-13
Brachidontes senhollsia ........................... 48-fi
Brochina glabella ................................. 23-18
Buccinum leucosioma ..... ........................ 3-11
B. suruga1!Tlm .............................. 3-11
Bulla mulliarata ................................. 21-14
B. ovula .......................................... 21-15
Byssobornia slriatissima ..................... 41-3, 4
c
Cadella delta .................................... 30-8-10
Cadulus gordonis ............................. .7-25, 26
Caccella chinensis .............................. 8-21, 22
Caecum vitreum .................................... 23-18
Calcar /zaematraga ................................ 39-7
Callista chinensis ..................... 9-9, 10; 31-5
C. limatula ................................. 39-21
Calyptraea mamilewis .............................. 5-5
Calliostoma aellieatum ...... ..................... 25--'18
C. cipangoanum ........................ 6-23
C. eonsors .................... 7-1; 28-25
C. sagamiallum .......................... 7-1
C. shinagawerlse cipangoanum ... 6-23
C. unicum var. shinagawensis ... 25-25
Callithaca adamsi ." ........................... 47-3, ,4
Calyptraea yokoyamai .............................. 5-5
Canarium japonicus .............................. 23-12
Cancellaria asprelln var. reeveana ... ......... 22-2
C. latieosta ...... ........................... 22-2
C. nodulifera ... ........................... 22-1
C. spengleriana ........................ 3-2, 3
Cantharidus ealliclzroa ........................... 8-26
C. japoniclls ........................... 6-26
Capulus badius· ....................................... 24-9
C. yokoyamai n. n ......................... 24-9
Cardilia semisulcata ............................. .45-16
Cardiomya gouldiana ............................. .48-7

D.
D.
D.
complexum ........................... 7-27
edoensis ................................. 7-28
nipponictem ........................... 26-7
D. octangulatum ........................ 7-24
D. octangulatum hexagonum ... 7-22, 23
D. octogonum ........................ 7-22-24
D. semipolitum ........................... 45-7
D. septentrionale .................. 7-19-21
D, seplentrionalis ........................ 26-6
D. weinkauffii ........... .7-19-21, 26-6
D. yamakaw:li .............................. 45-6
D. yokoyamai .............................. 7-27
Depressiscala auritum ........................... 24-13
Diala semistriata ..................... 38-20; 43-24
D. varia .............................. 38-20; 43-24
D. vitrea .......................................... 43-26
Didimacar tenebrica ..................... 18-5; 42-7
Didontoglossa koyasensis ........................ 48-1
Dinocardium braunsi ............... 32-4-6; 33-2
Diodora kosibensis ................................. 7-18
D. quadriradiata var. .. ................... 39-9
Diplodonta gouldi ................................. 11-5
D. japonica .............................. 11-4
D. lunaris .............................. 47-5, 6
D. semiaspera ............ 11-2. 3; 34-2
D. usta .................. 1IJ-14-16; 33-3
Ditrupa edoemis .................................... 7-28
D. ? gordonis ........................... 7-25, 26
Dlinocardium braunsi .............................. 11-1
Dolium luteostoma ................................. 5-2
D. luteostomum .................... , ...... 23-10
Donax cuneatus ................................. 29-8, 9
D. introraditus ........................... 29-8, 9
D. kiusiuensis ................................. 49-6
D. paululus .................................... 49-6
Dosinia bi/unulata ........................... 30-12. 13
D. troscheli ................................. 9-5. 6
D.' n. sp ........................................ 9-5, 6
Dosinorbis bilunulata ..................... 30-12, 13
Drillia benten ....................................... 2-22
D. brauns; ....................................... 2-25
D. cosibensis .................................... 2-26
D. fortilirata ................................. 43-20
D. glabriuscula ... ........................... 21-31
D. glabriuscula var. brevis ............ 21-32
D. nivalioides .................................. 2-27
D. principalis ................................. 2-20
D.
D.
D.
pseudoprincipalis ........................ 2-21
quantoana .................................... 2-23
subauriformis ........................... 21-30
- 57-
Drupa biconica .................................... 38-10
Dlmkeria shigeyasui ... ........................... 44-26
E
Ebala obscura .................................... 25-15
E. pagodu!a ............ ........................ 43-:-28
Eburna japonica ................................. 22-20
Egilina affectuosa ................................. 44-10
E. marielloides .............................. 24-34
. Elaeocyma benten ................................. 2-22
E. glabriuscula ........................ 21-31
E. glabriuscula brevis ............... 21-32
Emarginula jragilis .............................. 7-10
E. vadososinuala ........................ 26-5
E. sp ..................................... 7-15
Empleconia cumingii ........................... 37-6.7
Endemoconus siebold; ... ............................ 2-14
Endopleura lubrica .......................... .45-11. 12
Engina acuminata ................................. 38-3
E. menkeana ................................ 38-3
Enida japonica ........................... 6-33; 45-1
Entodesma naviculoides ........................ 26-11
Eocylichna braumi ................................. 2-5
Eotrapezium nipponicum ........................ 33-1
Epidromus obsczerus .............................. 38-9
ENtonium auritum .............................. 24-13
E. conjuncta ........................... 24-18
E. kazusensis ........................... 24-16
E. replicatum .............................. 44-1
E. sagamiensis ........................... 24-15
E. subfrondicula ........................ 24-19
E. stigmaticum ........................ 24-14
E. yamakawai ........................... 24-17
E. yokoyamai .............................. 44-2
E. sp ........................................ 44-5
Erato callosa ....................................... 23-11
Erodona amurensis ........................ 26-16-19
Erronea japonica .................................... 39-1
Ergalatax contractus .............................. 38-2
Ervilia otsuensis .............................. 8-21, 22
Erycina crassa ........................ 45-13; 46-4.5
Etremopa cosibensis .............................. 2-26
E. subauriformis ........................ 21-30
Evalea gordonis .................................... 24-27
E. toneana .................................... 24-31
E. n. sp ........................................... 25-7
Evalina nishiana ................................. 44-14
Eu.chelus fenestratus .............................. 7-2
E. pauperculus .............................. 7-2

- 60-
L. toJlaiensis ........................ 19-14-16 M. sinensis var. brevis ............ 26-3
L. woodwardi ............... '" ............ 37-5 Maclra dunked ... '" ........................... 27-7, 8
Lingula hians ... ................ , .... '" '" ......... 46-10 M. ovalina .............................. 27-12, 13
L. rostrum ................................. 46-10 M. sachalinensis var. imperialis ... 27-9,.10
Lirularia ornata '" ......... '" .................. 25-21 M. suicataria ................................. 27-6
L. pygmaea ........................... : .. 25-17 M. veneri/ormis .............................. 8-10
Lithophaga tima ................................. 40-11 ,llactromeris voyi ...... '" ..................... 28-1, 2
L. rtasuta ............... ................. .40-11 Madrepora sp. . ...................................... 1-3
L. sp. indet ............................ 37-14 Mammilla kurodai ..................... 24-11; 25-9
? Lithophaga zitteliana ........................... 37-14 Mamiilaria sag Imiensis ........................ 24-12
Litiopa semistriata .............................. 38-20 Mancine/la brOl1ni ................................ .4-27
L. simplex ... ................................ .43-26 M. clavigera ........................ 4-16, 27
Littorina adonis ................................... 48-8 M. siro .................. ..................... 38-4
L. brevicula ................................. 6-15 Mal1gilia deshayesii .................. '" ............ 2-24
L. lucida .................................... 48-9 M. /ukuchiana ........................... 21-34
Littorinopsis inter media .. . '" ..................... 48-8 M. gracilenta ............................. .43-13
Littorivaga brevicula .............................. 6-15 M. miyatensis ................................. 6-2
Lopha crenuti/era .............................. 42-1-4 M. ojiensis ................................. 21-33
L. folium ................................. 41-12, 13 M. oyuana ................................. 21-36
Loripes philipPiana ......................... .47-1, 2 M. parva .................................... 43-12
Lucina borealis .................................... 11-7 M. rugoso labiata ........................ 21-35
L. contraria .................................... 11-8 M. tabatensis .............................. 43-11
L. Pisidium .................................... 11-6 Margarita cinerea ................................. 6-30
L.
L.
spectabilis ........................... 11-10-12
siearnsiana .......................... .47-1, 2
M. umiiicata .............................. 6-29
Marginella cotamago .............................. 22-6
L. yomakawai ................................. 11-9 M. perovulum .............................. 22-7
Lucinoma concentrica .................. 11-7; 12-7 Marmoro.ltoma coreensis .................. 6-19, 20
L. spectabilis '" ..................... 11-10-12
Lucinopsis divaricata ............................. 30-7
Lunella coronatus coreellsis ...... 6-19, 20; 25-10
M.. granulatus ..................... 25-10
Martesia cupula ............ 39-15; 45-2,3; 49-1
M. striata var. tokyoellsis ........... .45-2,3
Lutraria maxima .............................. 28-9,10 Mazescala sub/rolldicu!a ........................ 24-19
L. radiata .................................... 8-11
L. sieboldi ..................... 8-11; 46-8, 9
L. sieboldtii ............................. .46-8, 9
Lyncina vitellus vitellus ............... 1-5; 38-11
Megacardia kiiellsis .. cipangoana" ......... 12-20
Megastomia rusticella .......................... .48-10
Melania nipponica ................................. 24--1
Melliteryx puncticulata ........................ 41-8, 9
Lyonsia 'praetenuis ........................... 34-9, 10 Menestho lljshiana ... .............................. 44-14
Lyromangilia semicarinata .................... 2-24 Mercenaria stimpson; ........................ 31-11,12
M
Merelina tokunagai .............................. 43-25
Meretrix chinensis ............ '" ... 9-9, 10; 31-5
Macoma dissimilis .................. 8-19, 20; 30-4 M. gordonis ........................... 45-13, 14
M.
M.
M.
M.
M.
incongrua ............... 8-19, 20; 9-1, 2
inquinata ................................. 9-12
nipponica .............................. 9-3, 4
praetexta .............................. 30-2, 3
secta ., ........ , ............................ 31-1
M. limatula ................................. 39-21
M. mentrix ................................. 31-4
M. meretrix lusoria ........................ 31-4
M. tigrina .................................... 39-16
Merica laticosta .................................... 22-2
M.
M.
sectior .................................... 31-1
tokyoensis ................................. 30-4
Merisca subtruncata ......... '" .............. 8-16, 17
M. tokunagai ................................. 8-24
Macridiscus venbri/ormis .................... .49-12 Metalycaeus melanopoma ........................ 45-5
Macroschisma diiatata ........................... 26-3 Microcirce gordonis ............................. .45-14
M. sinensis ............................. .7-3 Micro/usus obesi/ormis ........................... 3-13

- 67-
T. otsuensis ................................. 5-11 T. multigyrata ........................... 44--20
T. sematensis n. n. .. ................... 23-16 T. obscura ., ............................... 25-15
T. sp ....................................... .42-14 T. pacifica ................................. 25-13
Tristichotrochus aculeatum ... .................. 25-18 T. paucicostulata ....................... 24-37
T. conSOTS ............... 7-1; 25-25 T. planicostata ........................... 25-11
Tritia hiradoensis var ............................ 22-21 T. pseudocura ........................... 44-21
T. japonica ....................................... 4--5 T. sagamiana ........................... 25-12
T. luteola var ..................................... 4-6 T. scrobiculata ........................... 24-38
Triton costatus ........................... 1-9; 38-16 T. sematana .............................. 24-41
T. nodi/erus .................................... 44-25 T. semicolorata ........................... 44-22
T. obscurus ........................... 1-7; 38-:-9 T. shigeyasui ........................... 44-26
T. oregonensis ........................... 4-19,20 T. subapproximata ........................ 6-16
T. subpyrum ................................. 5-3, 4 T. subplanicostata .................... .44-23
T. tenuiliratus ................................. 23-8 T. teganumana ........................... 24-40
Tritonelta hiradoensis var ...................... 22-21 T. tokunagai .............................. 6-18
T. japonica ................................ .4-5 T. triarata ................................. 25-14
T. luteola var ............................... 4--6 Turcica coreensis ........................ 6-31; 25-23
Trivia oTyza ....................................... 43-22 T. imperia/is ..................... 6-31; 25-23
Trivirostra edgar; ................................. 43-22 Turcicula convexiuscula ........................... 6-32
Trochus atropurpureus ........................... 39-5 T. crumpi yokoyamai ............... 6-27, 28
T. gordonis ... '" ........................ '" ... 39-4 Turritella nipponica ........................ 5-16-19
T. spinigera ................................. 25-18 T. nipponica miyata ..................... 6-19
TroPhon candelabrum ..... .4-2; 7-13,14; 23-2 T. nipponica nipponica .................. 5-16
T. echinus .............................. 4-21-26 T. nipponica nojimaensis ......... 5-17, 18
T. inermis .............................. 4-21-26 Turritoma yokoyamai ........................... 21-37
T. muricatoides ............................. .4-17 Typhis arcuatus .................................... 23-3
T. nipponicus .......................... .4-13, 14
T. pachyrhaphe .............................. 23-1
T. subclatlatus ...... 4-2; 7-13,14; 23-2 u
T. xestra nipponicus .................. 4-13,14
Tucetiila pilsbTyi ..................... 19-3; 36-8,9
Tugali vadorosinuata .................. 7-15; 26-5
Turbiniscala replicatum .......................... .44-1
Uberella yokoyamai ................................. 5-1
Umbonium costalum ..................... 7-6; 44-27
U. giganteum ............................. .7-5
Turbo coreensis ................................. 6-19,20
T. cornutus .................................... 38-22 v
T. coronatus coreensis ...... 6-19,20; 25-10
T. granulatus ................................. 25-10 Varicorbula bi/rons ................................. 27-3
Turbonilla adamsi ................................. 6-17 Y. yokoyamai ........................ 27-4, 5
T. affectuosa .............................. 44-10 Vasticardium burchardi ........................... 32-3
T. angulifera ........................... 25-16 Yelutina takatensis ................................. 25-4
T. cingulata ................................ .48-6 Venatomya tachibanensis ....................... .49-5
T. dunkeri ................................. 44-21 Venericardia cipangoana ............... 12-2; 33-4
T. edoensis ................................. 44-24 V. /erruginea ........................ 12-3, 4
T. jiliola ... ................................. 48-16 V. kiiensis cipangoana ... 12-2; 33-4
T. humilis ................................. 39-3 V. tonemza ........................... 33-6,7
T. imbana ................................. 24-35 Venerupis insignis ..................... 10-2, 3; 40-4
T. keiskeana ............................... 44-19 V. irus ........................... 10-1; 39-23
T. kidoensis .............................. 24-39 V. semidecussata ........................ 10--.:6
T. kurumana .............................. 44-16 V. semipurpurea ..................... 32-1,2
T. misella ................................. 24-36 V. variegata var ...................... 10-4, 5

Jour. Sci. Call., Vol. XXXII, Art, 5, PI. r.
2
M. Yokoyama: Noma Fossils.
5
PI. 1
4

1. Retusa minima YAMAKAWA.
2. Volvulella radiola (A. ADAMS).
3. Ringicula doliaris mltsashinoensis
YOKOYAMA.
4. Adamnestia japonica (A. ADAMS).
5. Eocylichna braunsi (YoKOYAMA).
6. Pyrunculus phialus (A. ADAMS).
7. Cylichnatys yamakawai (YoKOYAMA).
8. Ringicula doliaris musashinoensis
YOKOYAMA.
9. Adamnestia japonica (A. ADAMS).
10. Myurella (Punctoterebra) lischkeana
(DUNKER) var.
PLATE 2.
Retusa minima YAMAKA W A.
!Volvula acuminata BRUGUlERE.
Naganuma.
Yokosuka.
Ringicula musashinoensis YOKOYAMA
(Holotype). Naganuma.
!Cylichna musashiensis TOKUNAGA.
C. braunsi YOKOYAMA (Holotype).
=C. sibaensis YAMAKAWA.
C. yamakawai YOKOYAMA.
Ringicula musashinoensis YOKOYAMA
(Paratype).
= Cylichna orientalis
(Monotype ).
Terebra lischkeana DUNKER.
YOKOYAMA
Koshiba.
Naganuma.
Kami-Miyata.
Yokosuka.
Naganuma.
Koshiba.
Kami·Miyata.
11. M. (Pervicacia) recticostata (YOKO-. T. recticostata YOKOYAMA (Holotype). Naganuma.
YAMA).
12. M. (Strioterebrum) naumanni (YoKO· T. naumanni YOKOYAMA (Holotype). Naganuma.
YAMA).
13. M. (S.) tokunagai (YoKOYAMA). T. tokunagai YOKOYAMA (Monotype). Naganuma.
14. Asprella (Endemoconus)
(REEVE).
sieboldi Conus sieboldi REEVE. Koshiba.
15. A. (Parviconus) tuberculosus (TOM- =C. tuberculatus YOKOYAMA (non
LIN). DUJARDIN), (Hololype by TAKI,
1937). Koshiba.
16. Do. Do. (Paratype).
17. " Cryptogemma" yokoyamai
n. n. (Holotype).
OYAMA =t=Plellrotoma kamakurana PILSBRY. Koshiba.
18. Riuguhdrillia mediocarinata (YOKO- P. mediocarinata YOKOYAMA. (Mono-
YAMA). type). Nojima.
19. A/oria nojimensis (YoKOYAMA). P. (SuYCItla ?) nojimensis
YAMA), (Monotype).
YOKO· Nojima.
20. Inquisitor (s. s.) je!f'reysi (E. A. =P. (Drillia) principalis PILSBRY. Naganuma.
SMITH).
21. I. (Pseudoinquisitor) pseudoprincipalis P. (D.) pseudoprincipalis YOKOYAMA
(YOKOYAMA). (Holotype). Naganuma.
22. Clavus (Elaeocyma) benten (YoKo- P. (D.) benten YOKOYAMA (Mono-
YAMA). type). Naganuma.
23. Tomopleura quantoana (YOKOYAMA). P. (D.) quantoana YOKOYAMA
(Holotype). Naganuma.
24. Bellaspira (Lyromangilia) semicarinata
(PILSBRY).
!P. (Mangilia) deshayesii DUNKER. Koshiba.
25. Clavus (Imaclava) braunsi (YoKo- P. (Drillia) braunsi YOKOYAMA
YAMA). (Holotype). Koshiba.
26. Etremopa cosibensis (YoKOYAMA). P. (D.) cosibensis YOKOYAMA (Holotype).
Koshiba.
27. Paradrillia nivalioides (YoKOYAMA). P. (D.) nivalioides YOKOYAMA
(Holotype). Koshiba.

Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI. 1. PI. 2
a
1 b a a 5 d a 9 b
a b 4
7
C
C
2
24
.:i
b
6
b
a
a b
j
b
+
c ;
I
21
' 22
19
I
a b
b j
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.
26
b
a
b

1. Antiplanes (Recliplanes) glabra
(YoKOYAMA).
2. Cancellaria (Sydaphera?) spengleriana
DESHAYES.
PLATE 3.
Pleurotoma (Bela?) glabra YOKO-
YAMA (Monotype). Koshiba.
Cancellaria spengleriana DESHA YES. Naganuma.
3. Do. Do. Otsu.
4. Mitra consibensis OTUKA.
5. Admete yokoyamai OYAMA
(Hoiotype).
=t=Mitra ebenus LAMARCK.
n. n. =t=Admete viridula FABRICIUS.
6. Mitra kurakiensis HATAI et NISI- =t=Mitra /usi/ormis BRoCCHl.
YAMA.
7. Granuli/usus makiyamai (OTU!'A). I Fusus nipponicus SMITH.
8, 10. Neptunea yokoyamai OYAMA =t=Chrysodomus phoeniceus DALL.
(Paratype).
9. Do., (Hoiotype). =t=Do.
11. Buccinum suruganum DALL.
12. Neptunea (Barbitonia)
(BERNARDI ).
arth,.itica
13. Nassaria (Micro/usus)
(YoKOYAMA).
obesi/ormis
14. Siphonalia /usoides (REEVE).
15. S. spadicea (REEVE).
16. Benthovoluta hilgendorfi (v. MAR­
TENS)
I Buccinum leucostoma LISCHKE.
ISiphonalia di/atata QUOY.
Koshiba.
Koshiba.
Koshiba.
Shimo·Miyata
Koshiba.
Do.
Nojima.
Shimo-Miyata
Siplzo obesi/ormis YOKOYAMA. (Hoiotype).
Naganuma.
ISiphonalia trochulus REEVE.
IS. fuscolineata PEASE.
Naganuma.
Naganuma.
=Mitra plici/era YOKOYAMA (Holo.
type). Koshiba.
17. Fusinus perplex us (A. ADAMS). Fusus perplexus REEVE. Naganuma.
18. Fulgoraria (Psephaea)
kamakurensis OTUKA.
prevostiana =i=Voluta megospira SOWERBY (Holo-
type). Koshiba.

Jour, Sci. CoIl., Vol. XXXIX, Art. 6, PI. II.
1. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.
PI. 3

1. Beringius (J apelion)
(DALL).
2. TroPhon (Austrotrophon) candelabrum
REEVE.
3. Siphonalia modificata (REEVE).
4. S. spadicea (REEVE).
5. Tritia (Tritonella) japonica (A.
ADAMS) ..
PLATE 4.
adelphicus = Chrysodomus schrencki YOKOY AMA
(Holotype). Koshiba.
= TroPhon subclavatus YOKOYAMA
(Hoiotype ).
= Siphonalia stearnsii PI LSBRY.
/00.
Nassa (Hima) japonica A. ADAMS.
Shimo·Miyata.
Naganuma.
Do.
Yokosuka.
6. T. (TritoneUa) luteola (E. A. SMITH) / N. (H.) festiva PaWlS. Kami·Miyata.
var.
7. Mitrella (s. s.) bllrchardi (DUNKER)
var.
8, 9. Siphonalia spadicea (REEVE).
10. Do.
11. S. modificata (REEVE).
12. Volutharpa perryi (JAY).
13. TroPhon (Austrotrophon) xestra
l1iPPOlliC1lS YOKOYAMA.
l't. Do.
15. Mitrella (s. s.) dunlleri (TRYON).
16. Purpura (Mancinella) clavigera
(KUSTER).
17. Fusinlls muricatoides (YOKOYAMA).
Columbella
DUNKER.
(Atilia) bm'chardi
Siphonalia spadicea (REEVE).
Do.
/00.
Yokosuka.
Shimo·Miyata.
Otsu.
Motowada.
Volutharpa perryi JAY. Shimo·Miyata.
Trophon l1ipPonicus YOKOYAMA
(Paratype). Koshiba.
Do. (Hoiotype). Teramae.
Columbella (Mitrella) dunlleri TRYON. Yokosuka.
/ Purpura alveolats REEVE. Naganuma.
Trophon muricatoides YOKoYAMA
(Monotype). Kami·Miyata.
18. Nassarills (Zeuxis) cae/atlts (A. / Nassa (Niotha) liveEcens PHILIPPI. Shimo·!v1iyata.
ADAMS).
19, 20. Fusitriton oregonensis (REDFIELD)
var.
Triton (Priem) oregollensis RED·
FIELD. Koshiba.
21-26. TroPhon (Bathymurex) echinlls /Trophon inermis SOWER BY. Koshiba.
DAI.L.
27. Purpura (Moncillella) bronni (DUN. / Purpura luteostoma CHEMNITZ. Otsu.
KER).

Jour. Sci. ColI. . Vol. XXXIX, Art. 6, PI. III. PI. 4
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.

1. Starkeyna sabrina (A. ADAMS).
2. Ophiodermella
YAMA).
miyatensis (YoKO.
3. Natica (Tectonatica) severa GUULD.
4. Do.
5. PoUnices (Glossaulax) didyma
(RODING).
6. P. (G.) reiniana (DUNKER) var.
7. Balcis yokosukensis (YoKOYAMA).
8. B. sagamiana (YoKOYAMA).
9. Odostomia (s. s.) hilgendorfi CLESSIN.
]0. Chrysallida (Salassiella)
gawensis (TOKUNAGA).
tallino·
11. Tiberia pseudopulchella (YOKOYAMA).
12. Cirsotreml
YAMA).
turriculoides (YOKO·
13. Odostomia (s. s.) sublimpida YOKO·
YAMA.
14. Amaea densicostata (YoKOYAMA).
15. Littorina (Littorivaga) brevicula
(PHILIPPI).
16. Turbonilla (s. s.) subapproximata
YOKOYAMA.
17. Cingulina (s. s.) adamsi YOKOYAMA
( ? circinata A. ADAMS)"
18. Turbonilla (Paramormula) tokunagai
YOKOYAMA.
19, 20. Turbo (Lunella) coronatus coreensis
Rf:cLUZ.
21. Leptothyra sangarensis (StHRENCK).
22. L. amussitata (GoULD).
23. CaUiostoma (Tristichotrocllus) shina·
gawense eipangoanum YOKOYAMA.
24. Tegula (Chlorostoma) pfeifferi
(PHILIPPI).
25. T. (C.) tokl/nagai (YoKOYAMA).
26. Cantharidus (s. s.) callichroa
(PHILIPPI).
PLATE 6.
=Skenea nipponica YOKOYAMA (Ho!o.
type).
Pleurotoma (Mangilia) miyatensis
YOKOYAMA (Ho!otype).
/ N atica jant/lOstoma DESHAYES.
/00.
= Polinices ampla PHILIPPI.
IDo.
Eulima (Leios/raca) yokosukc1Isis
YOKOYAMA (Monotype).
Otsu.
Shimo·Miyata
Koshiba.
Naganuma.
Naganuma.
Naganuma.
Yokosuka.
E. (L.) sagamia1la YOKOYAMA
(Monotype). Naganuma.
Odostomia (s. s.) hilgendorfi CLESSIN. Naganuma.
O. (Parthenia) ta/iinogawensis TOKU·
NAGA. Naganuma.
Pyramidella (Tiberia) Pseudopulehella
YOKOYAMA (Monotype). Naganuma.
Sealaria turriculoides YoKOYAMA
(Monotype). Koshiba.
Odostomia (s. s.) su1;limpida YOKO·
YAMA (Ho!otype). Okine.
Scalaria (Acrilla) de1lsicostata YOKO·
YAMA (Ho!otype). Koshiba.
/ Leptothyra d. parcicostata DALL. Otsu.
Turbonilla (Chemnitzia) subap.
proximata YOKOYAMA (Mono type). Naganuma.
T. (Cingulina) adamsi YOKOYAMA
(Ho!otype). Naganuma.
T. (Mormula) tolumagai YOKOYAMA
(Monotype). Otsu.
Turbo (Marmorostoma) coreensis
RECLUZ. Yokosuka.
fLeptotllyra amllssitata GOULD. Shimo·Miyata.
I L. purpurescens DUNKER. Shimo·Miyata.
Calliosto11'i1 cipangoanum YOKOYAMA
CMonotype). Yokosuka.
= Cillorostolna qualltoanum YOKOYAMA
(Monotype). Yokosuka.
C. tokunagai YOKOYAMA (Monotype). Yokosuka.
ICantharidus japonieus A. ADAMS. Otsu.
27. Turcicula crumpi yokoyamai OTUKA. =!=Bembix crumpi PILSBRY. Kamakura.
28. Do. 100. Teramae.
29. Solarielia sp. indo IMargarita umbilica/a BIWDERIP et
SOWER BY. Kamakura.
30. Minolia nyssona (DALL). 1M. cinerea COUTHOUY. Kami·Miyata.
31. Turcica coreensis (PEASE). = Turcica imperia/is A. ADAMS. Shimo·Miyata.
32. Turcicula eonvexiuscula
YAMA).
(YOIW. Bembix convexiusculus YOKOYAMA
(Ho!otype). Kamakura.
33. Gibbula (Enida) japonica (A. ADAMS). = Chlorostoma miyatense YOKOYAMA,
(Ho!otype). Shimo.MiYata.

Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI. VI. PI. 7
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.

Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI, VII.
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.
PI. 8
a
23
b

Jour. Sci. ColI., Vol. XXXIX, Art. 6, Pl. VIII
.
\
J. Ishizaki del.
-.
. . . ,
"
--. - ... --- .......
M. Yokoyama: Fossils from Miura Peninsula.
"
PI. 9

1. Irus mitis (DESHAYES).
2. Petricola (Pseudoirus)
DESHAYES.
PLATE 10.
IVenerupis irus LINNE.
mirabilis IV. insignis DESHAYES.
Yokosuka.
Otsu.
3. Irus ishibaslzianus KURODA et HABE. IDo. Yokosuka.
4, 5. Venerupis (Amygdala) variegata
(HANLEY) var.
6. V. (A.) semidecussata (REEVE) ..
7. Paphia (s. s.) naganumana OTUKA.
8, 9. Saxidomus purpuratus SOWERBY.
10. Clinocardium cali/orniense (DESHA·
YES) var.
11. Fulvia mutica (REEVE).
12, 13. Nemocardium (Keenaea) sama·
rangae lMAKIYAMA).
14-16. Diplodonta (Felaniella) usta GOULD.
Tapes variegalus HANLEY.
IT. philippinarum ADAMS et REEVE. Otsu.
Kami.Miyata.
IT. amabilis PIlILIPPI. Naganuma.
Saxidomus purpuralus SOWER BY. Yokosuka.
Cardium cali/orniense DESHAYES. Kami.Miyata.
C. muticum REEVE. Okine.
= C. modestum ADAMS et REEVE (non
PHILIPPI). Koshiba.
Diplodonta usta GOULD. Kami·Miyata.

Jour. Sci. CoIl., Vol. XXXIX, Art. 6, PI. IX. PI. 10
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.

Jour. Sci. CoIl., Vol. XXXIX, Art. 6, PI. XI. PI. 12
1. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.
, b
)

1. Pecten (PatinoPecten) /okunagai
YOKOYAMA.
2. Chlamys (s. s.) miurensis (YOKO­
YAMA).
3-6. Do.
7. Chlamys nobilis (REEVE).
8. Lima (s. s.) zushiensis YOKOYAMA.
PLATE 13.
Pecten tokunagai YOKOYAMA (Monotype).
Koshiba.
P. miurensis YOKYOAMA (Holotype). Zushi.
Do. (Paratype). Do.
= P. crssicostatus SOWERBY. Naganuma.
Lima zushiensis YOKOYAMA (Holotype).
Zushi.
9. Limatula (Stabilima) japonica A. L. japonica ADAMS. Nojima.
ADAMS.
10. L. (s.s.) kurodai OYAMA. fL. subauriculata MONT. Kami-Miyata.
11. Lima (s. s.) quantoensis YOKOYAMA. L. qualltoensis YOKOYAMA (Holotype).
Koshiba.
12. Limea (Promatellum) hakodatensis fL. angulata SOWERBY. Naganuma.
TOKUNAGA.

3
Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI. XII.
J. Ishizaki del.
2
I
\
\ ,
\
9c
M. Yokoyama : Fossils from Miura Peninsula.
12
1
PI. 13

PLATE 14.
1-3. Chlamys (Vepriclzlamys) jousseaumei / Pecten irregularis Sow.
BAVAY.
4. Pecten (Notovola) albicatlS naga· P. naganumana YOKOYAMA.
numanus YOKOYAMA.
5,6. Do.
7, 8. Chlamys (Chlamys)
(YoKOYAMA).
cosibensis
9, 10. Polynemamussium intuscostatum
(YoKOYAMA).
11-13. Aeqllipecten (Cryptopecten) vesicu·
losus (DUNKER).
14, 15. Pecten (Patinopecten) yessoellsis
JAY.
Do.
P. cosibensis YOKOYAMA.
P. intuscostatus YOKOYAMA.
P. vesiculosus DUNKER.
P. yessoensis JAY.
Koshiba.
Naganuma.
Naganuma.
Koshiba.
Kami·Miyata.
Koshiba.
Koshibtl.

Jour. Sci. Coll., Vol. XXXIX, Art. 6, PI. XIII. PI. 14
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.

1. Chlamys (5.5.) nipponensis KURODA.
2. Do.
3, 4. C. (5.5.) squamata (GMELlN).
5. C. (5.5.) eosibensis (YOKOYAMA).
6. Do.
PLATE 15.
/ Pecietl laetus GOULD.
/Do.
P. squamatus GMELlN.
/ P. tigerrinus MULLER.
/Do.
7. Pecten (Patino pecten) tokyoetlsis Pecten tokyoensis TOKUNAGA.
TOKUNAGA.
8. Do.
9. P. (Notovola) alMea1ls (SCHR

Jour. Sci. Call., Vol. XXXIX, Art. 6, Pl. XIV.
]. lshizaki del.
M. Yokoyama: Fossils from -Miura Peninsula.
PI. 15

PLATE 16.
1, 2. Ostrea denselamellosa LISCHKE. IOstrea gigas THUNBERG.
3, 4. Ostrea (Crassostrea) gigas THiJN· Do.
BERG.
Yokosuka.
Do.

Jour. Sci. CoIl., Vol. XXXIX, Art. 6, PI. XV. PI. 16
1. Ishizaki del. M. Yokoyama : Fossils from Miura :Peninsula.

1, 2. Ostrea (Notostrea) musashiana
YOKOYAMA.
3. Do.
4,5. Do.
6. O. (Crassostrea) gigas THUNBERG.
7, 8. Lima (Aeesta) goliath SOWERBY.
9. "Barbatia" sp.
PLATE 17.
Ostrea musashiana
(Paratypes ).
D. (Ho!otype).
Do. (Paratypes).
O. denselamellosa LISCHKE.
Lima goliath SMITH.
Area stearnsii PI LSBRY.
YOKOYAMA
Koshiba.
Koshiba.
Yokosuka.
6tsu.
Koshiba.
Koshiba.

Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI. XVI.
1
J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula.
PI. 17

1. Ostrea (s. s.) circumpicta PILSBRY.
2. O. (Crassostrea) rivularis GOULD var.
3. O. (s. s.) circumpicta PILSBRY.
4. Arca miyatensis OYAMA.
5. Slriarca (Didimacar)
(REEVE).
6. Pseudogrammatodon obliquatus (YoKO'
YAMA) var.
7, 8. Striarca (Calactella) yo/wyamai
(NOMURA).
9. Anadara (Scapharca) broughtoni
(SCHRENCK).
10, 11. Clycymeris vestita (DUNKER) var.
PLATE 18.
IOstrea plicata CIIEMN.
IDo.
IDo.
+A"ca kobeltialla PILSBRY.
tenebrica / A. decussata Sow.
Otsu.
Otsu.
Otsu.
Shimo· Miyata.
Yokosuka.
Parallelodon ob/iquatus YOl

Jour. Sci.: CoIl., Vol. XXXIX, Art. 6, PI. XVII. PI. 18
b-- ,-' - <
j , Ishizaki del. M. Yokoyama : Fossils from Miura Peninsula.

Jour. Sci. ColI., Vol. XXXIX, Art. 6, PI. XVIII. PI. 19
.J. Ishizaki del. M. Yokoyama: Fossils from Miura Peninsula .

Jour. Sci. Coll., Vol. XXXIX, Art. 6, PI. XIX. PI. 20
b a c
J. Ishizaki del. M. Yokoyama : Fossils from Miura Pen:nsula.
7

Jour. Sci. ColI., Vol. XLIV, Art. 1. PI. II. PI. 22
J. Ishiz3ki del. M. Yo!wyama: Fossils from Kazusa and Shimosa

-- -------- - ----
PLATE 23.
1. Bedevina birileffi LISCHKE. /Trophon pachyrhaPhe SMITH.
2. Trophon (Austrotrophon) candelabmm = T. subcia'vatus YOKOYAMA.
(ADAMS et REEVE).
3. Siphonochelus (s. s.) japonicus (A. /Typhis arcuatus HINDS.
ADAMS).
4. Ceratostoma (Ocetzebra) aduncum /Ocinebra falcata SOWERBY.
(SOWERBY).
5. Do.
6. Rapana thomasiana CROSSE.
7. Polytropa heyseana (DUNKER).
8. Cymatium (SePta ?) tenuiliratum
(LISCHKE).
9. Phalium strigosum (GMELIN).
10. Tonna luteostoma (KUSTER).
11. Proterato (Sulcerato) callosa (ADAMS
et REEVE).
12. Canarium (Labiostrombus) japonicus
(REEVE).
13. Cerithium (Proclava) kochi PHILIPPI.
14. Myurella (Pervicacia) latisulcata
(YoI

1. Semisulcospira libertina (GOULD)
forma hidachiensis PILSBRY.
2. Torinista elegantula (YoKOYAMA).
3. Rissoalaba. plebeja (YoKOYAMA).
4. Chrysallida (Salassia) manzakiana
(YoKOYAMA).
5. Eufenella rufocincta (A. ADAMS).
6. Da.
7. Sta1'keyna sobrina (A. ADAMS)'
8. Sericominol ia planorboides (Yo [(0-
YAMA).
9. Capulus (Capulus) yokoyamai
OYAMA, n.n.
10. Crepidula (Crepidula) grandis
MIDDENDORF.
11. Mammilla llUrodai OW. TAKI).
12. Polinices (Mamillaria) sagamie11sis
(PILSBRY).
13. Epitonium (DePressiscala) auritllm
(SOWERBY).
14. E. (Glabriscala) stigmaticllm
(PILSBRY).
15. E. (Cinctiscala) sagamiensis
(PILSBRY).
16. E. (C.) kazllsellsis (YoKOYAMA).
17. E. (C.) yamakawai (YOKOYAMA).
18. E. (Acutiscala) conjuncta (YOKO­
YAMA).
19. E. (Mazescala) subfro11dicula
(YOKOYAMA).
20. Amaea pieturata (YOKOYAMA).
21. Eulima unici11cta (YOKOYAMA).
22. Balcis toliunagai (YOKOYAMA).
23. B. glabroides (YOKOYAMA).
24. B. Ilrisl111a (YOKOYAMA).
25. SY1'nola (Jphiana) mira (YOKOYAMA).
26. s. (I.) siva (YOKOYAMA).
27. Odostomia (Evalea) g01'donis YOKO-
YAMA.
28. O. (s. s.) shimosensis YOKOYAMA.
29. O. (s. s.) kizakiensis YOKOYAMA.
30. Agatha brevis (YOKOYAMA).
31. Odostomia (Evalea) toneana YOKO-
YAMA.
32. O. (s. s.) suboxia YOKOYAMA.
33. Kleinella l1cofelix (YOKOYAMA).
34. Chrysallida (Partlilida) mariel/oides
(YOKOYAMA).
35. TU1'bonilla (s.s.) imbana YOKOYAMA.
36. T. (Pfycheulimella) misella YOKO­
YAMA.
37. T. (Paramormula) paucicostulata
TOKUNAGA.
38. T. (P.) scrobiculata YOKOYAMA.
39. T. (s. s.) liidoensis YOKOYAMA.
40. T. (s. s.) teganumana YOKOYAMA.
41. T. (s. s.) sematana YOKOYAMA.
PLATE 24.
IMelania nipponica SMI!H.
Torinia elegantula YOKOYAMA
(Monotype).
Rissoa (Cingula) plebeja YOKOYAMA
(Holotype ).
Rissoina (Moerchiella) manzakiana
YOKOYAMA (Ho!otype).
=Fenella septent1'ionalis TOKUNAGA.
Do.
=Skenea nJpponica YOKOYAMA.
S. planorboides YOKO'!AMA (Holotype).
+Capulus badius DUNKER.
Crepidula grandis MIDDENDORF.
+Sigaretus (Eunaticina) oblongus
REEVE.
I Polinices powisianus RECLUZ.
Scalaria auyita SOWERIW.
Is. maculosa ADAMS.
Otake.
Shit6.
ShiH>.
Otake.
o take.
Tega.
Tega.
Shit6.
Kamenari.
Shit6.
ShiH).
Otake.
Otake.
Otake.
=S. azumana YOKOYAMA (Holotype). Shit6.
S. kazusensis YOKOYAMA (Holotype).
Shit6.
S. yamakawai YOKOYAMA (Holotype).
Otake.
S. conjuncta YOKOYAMA (Holotype).
Tega.
S. subfrol1dicula YOKOYAMA
(Monotype). ShitO.
S. picturata YOKOYAMA (Holotype). Shit6.
Eulima (Leiostraca) u11icincta YOKO-
YAMA (Holotype). Otake.
E. (L.) tokunagai YOKOY AMA
(Holotype). Otake.
E. (L.) glabroides YOKOYAMA
(Holotype). Shit6.
E. (L.) lirishna YOKOYAMA
(Monotype). Shit6.
PYYamidella (Jphiana) mira YOIW-
YAMA (Holotype). Shit6.
P. (I.) siva YOKOYAMA (Monotype).
ShitO.
Odostomia (Odostomia) gordonis
YOKOYAMA (Ho!otype). Otake.
. O. (0.) shimosensis YOKOYAMA
(Holotype). Otake.
O. (0.) kizakiensis YOKOYAMA
(Holotype). Tega.
=0. (0.) venusta YOKOYAMA
(Holotype). Shit6.
O. (0.) [oneana YOKOYAMA (Holotype).
Otake.
O. (0.) suboxia YOKOYAMA (Holotype).
Otake.
O. (Odetta) neofelix YOKOYAMA
(Holotype). Tega.
O. (Eg'lina) mariel/oides YO[(O-
Y AMA (Holotype). Shisui.
Turbonilla (Chemnitzia) imbana
YOKOYAMA (Holotype). Otake.
T. (Ptycheulimella) misella YO/{O-
YAMA (Holotype). Otake.
T. (Mormula) paucicosfulata TOKU-
NAGA. Shit6.
T. (M). scrobiculata YOKOYAMA
(Holotype). Otake.
T. (Chemnitzia) kidoensis YOKO-
YAMA (Holotype). Tega.
T. (C.) tef{anumana YO;WYAMA
(Holotype). Tega.
T. (Co) sematana YOKOYAMA. Shit6.

Jour. Sci . Col1., Vol . XLIV , Art., 1 PI . V.
.
J, Ishizaki del. M. Yokoyama. . Fossils from Kazusa an d Shimosa.
PI. 25

PLATE 26.
1. Actaeopyramis (!ximia (LISCIIKE). Pyramidella (Actaeopyramis) eximia
LISCHKE. Otake.
2. Stomatella lyrata PILSBRY. Stomatella lyrata PILSBRY. Otake.
3. Macroschisma dilatata A. ADAMS. = Macrosclzisma sinensis AD. Var. brevis
YOKOYAMA (Holotype). Otake.
4. Puncturella (s. s.) nobilis A. ADAMS. Puncturella nobilis AD. Shito.
5. Tugali vadososinuata (YoKOYAMA). Emarginula vadososinuata YOKOYAMA. Shito.
6. Dentalium (Antalis) septentrionalis =i=Dentalium weinkauffii DUNKER. Otake.
KURODA, MS.
7. D. (Fustiaria) nipponicum YOJ(O· D. (Fustiaria) nipponicum YOJ(O·
YAMA. YAMA (Holotype). ShitO.
8, 9. Caryocorbula (Solidicorbula) ery·
ihrodon (LAMARCK).
10. Pholadidea (PenUel/a) kamakurensis
(YoKOYAMA).
11. Entodesma naviculoides YOKOYAMA.
12, 13. Hiatella orientalis (YoKOYAMA).
14. Panope japonica A. ADAMS.
15. Do.
15. Erodona amurensis (SCHRENCK).
17. Do.
18. Do.
19. Do.
20. Poromya flexuosa (YoKOYAMA).
Corbula erythrodon LAMARCK. Otake.
J ouannetia· kamakurensis YOKOYAMA
(Holotype). ShiW.
Entodesma naviculoides YOKOYAMA
(Monotype). Shito.
/Trapezium nipponicum YOKOYAMA
(Paratypes). Shito.
I Panope generosa GOULD. Tega.
Do. Otake.
=Corbula frequens YOKOYAMA (Holotype).
Shito.
= Do., (Paratype). Do.
=C. pustulosa YOKOYAMA (Holotype). Otake.
=C. sematensis YOKOYAMA (Holotype).
Shito.
IDo. (Paratype). Shito.

Jour. Sci. CoIl., Vol. XLIV, Art. I, PI. VI. PI. 26
J. Ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa.
/

1. Cryptomya (s. ·s.) busoensis YOKO­
YAMA_
2. Do.
3. Varicorbttla bi/rons (A. ADAMS).
4. V. yokoyamai HABE.
5. Do.
6. Mactra (s. s.) sit/cataria REEVE.
7. Spisula sachalinel1sis (SCHRENCK).
8. Do.
9. Do.
10. Do.
11. Soletellina (Nuttalia) olivacea JAY.
PLATE 27.
Cryptomya busoel1sis YOKOYAMA
(Paratype). 6take.
Do. (Holotype).
=Corbula substriata YOKOYAMA (Holotype).
=c. pygmaea YOKOYAMA (non
HANLEY 1856) (Paratype).
Do. (Holotype).
Do.
Shitil.
Tega.
Do.
= Mactra sit/cataria DESHA YES. Shitil.
=M. dunkeri YOKOYAMA (Paratype). Shiiil.
= Do. (Holotype). Do.
= M. sac halinel1sis SCHRENCK var.,
imperialis YOKOYAMA (Paratype). Shitil.
= Do. (Holotype). Do.
Soletellina oiivacea JAY. Shito.
12. Schizothaerus keenae KURODA et / Mactra ooatina LAMARCK. 6take.
HABE.
13. Do. \ IDo. Tega.

Jour. Sci. CoIl., Vol. XLIV, Art. 1, PI. VII.
\ a
.'\j
.T. Ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa .
Pl. 27

1, 2. Spisula (Mactromeris) voyi GABB.
3, 4. Oxyperas bernardi (PILSBRY).
5, 6. Raeta (Raetellops) yokohamensis
PILSBRY.
PLATE 28.
=Spisula grayana SCHRENCK.
S. bernardi PILSBRY.
Raeta yokohamensis PILSBRY.
ShiH).
Kioroshi.
6 take.
7. Do. =R. elliptica YOKOYAMA (Ho!otype). Tega.
8. Schizothaerus kecnae KUlWDA et /Tfesus nuttali CONRAD. 6take.
HABE.
9, 10. Lutraria maxima JONAS. Lutrm'ia maxima JONAS. 6take.
11. Fab/tlina (s. s.) nitidula (DUNKER). Tallina nitidula DUNKER. Shisui.
12. Raeta (Raetina) pellicula REEVE. =Raeta magnifica YOKOYAMA (Holotype).
Tega.
13. Do. Do. (Paratype). Do.

Jour. Sci. ColI., Vol. XLIV, Art. 1, PI. VIII.
J. Iohizaki del. M. Yokoyama: Fossils from Kazllsa and Shimosa.
PI. 28

PLATE 29.
1. Solen grandis DUNKER. Solen grandis DUNKER. 6take.
2. Mysella japonlca (YoKOYAMA). Montacuta japonica YOKOYAMA
(Holotype). 6take.
3. Do. Do. (Paratype). Do.
4. Garl (Psammocola) califorl1ica = Psammobia kazusensis YOKOYAMA
(CONRAD).
(Ho!otype). Shito.
5. Solen krusensterni SCHRENCK.
6. Raeta (Raetina) pellicula (REEVE).
7. Siliqua pulchella DUNKER.
8, 9. Donax (VItona) cllneatus LINNf:.
10. Mysella yamakawai (YoKOYAMA).
11. "Thyasira" trigonata YOKOYAMA.
12. Do.
Solen krusenstemi SCHRENCK.
= Raeta pellicula DESHAYES.
Siliqua pulchella DUNKER.
(Donax introradiatus REEVE.
6take.
6take.
6take.
Tega.
Montacuta yamakawai
(Holotype).
YOKOYAMA
Shisui.
Thyasira trigonata
(Ho!otype).
YOKOYAMA
ShitO.
Do. (Paratype).
Do.
13, 14. Soletellina (s. s.) atrata REEVE. (Soletellina viol ace a LAMARCK. 6take.
15, 16. Fahulil1a (Mon'ella) miyatensis (Tellina jedoensis LISCHKE.
Tega.
17.
(YoKOYAMA).
Soletellina (Nuttalia) olivacea JAY. Soletellil1a olivacea JAY. Shito.

PLATE 30.
1. Angulus (Peronidia) venulosa (SCH. Tellina venulosa SCHRENCK.
RENCK).
6take.
2, 3. Macoma (s. s.) praetexta (Y. MAR· Macoma praetexta (MARTENS). Shisui.
TENS).
4. M. (s. s.) tokyoensis MAKIYAMA.
5. Angulus (Peronidia) venulosa (SCli.
RENCK).
6. Do.
7. Lajonkairia divaricata (LISCHKE).
8. Cadella delta (YOKOYAMA).
9,10. Do.
= M. dissimilis MARTENS (non
DESHA YES). 6take.
Tellina alternata SAY var. chibana
YOl

Jour. Sci. CoIl., Vol. XLIV, Art. 1, PI. x. PI. 30
J. Ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa.

1. Macoma (Rexithaerzes) secti01' OYAMA,
2, 3, Anomalocardia (Veremolpa) minzeta
(YoKOYAMA).
4. lVleretrix meretrix lzesoria (RODING).
5. Callista (5.5.) chinensis (HOLTEN).
6. Szenetta (Cyclosunetta) menstrzea/is
(MENKE).
7,8. Do.
9. Gomphina (s. s.) neastartoides (YO!W­
YAMA).
10. Do.
11, 12. Mercenaria stimpsoni (GouLD).
PLATE 31.
/ Macoma secta CONRAD.
/Chione mindanensis SMITH.
/Meretrix meretrix LINN6:,
=M .. (Callista) chinensis CHEMNITZ.
/ Sunetta excavata HANLEY.
/00.
6take.
ShiH>.
6take.
Sbito.
Kioroshi.
6take.
Venus neastm'toides YOKOYAMA
(Ho!otype). Kioroshi.
Do. (Paratype).
V. stimpsoni GOULD.
Do.
6take.

1, 2. Petricola (Petrico/arius) aequistriata
SOWERBY.
3. Acrosterigma (Vasticardium) burchardi
(DUNKER).
4. Dinocardium braunsi (TOKUNAGA).
5. Do.
6. Do.
7. Fulvia mlltica (REEVE).
8. Papllia (s.s.) vernicosa (GOULD).
9. Saxidomlls pUlpuratus SOWERBY.
PLATE 32.
(Venerupis semipurpltrea DUNKER. 6take.
Cardium burchardi DUNKEI{. 6take.
=c. tolllfnagai YOKOYAM,\ var. ovata
YOKOYAMA (Monotype). Shisui.
=C. tokunagai YOKOYA!"IA (Paratype). 6take.
=Do. (Ho!otype). Do.
C. muticum REEVE. 6take.
(Tapes euglyptus PHILIPPI. Kioroshi.
Saxidomus pur,buratus SOWERBY. 6take.

Jour. Sci. ColI., Vol. XLIV, Art. 1, PI. XII. PI. 32
1. ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa.

1. Trapezium (Eotrapezium) nipponicum
YOKOYAMA.
2. Dinocardium braunsi (TOKUNAGA).
3. Diplodonta (Pelaniella) usta GOULD.
4. Venericardia (Megacardia) lliiensis
cipangoana YOKOYAMA (P:'lTs).
5. Chama asparsa REEVE.
6. Carditella tomana (YoKOYAMA).
7. Do.
8. CrassateUites (s. s.) names (ADAMS et
REEVE).
9. Mysel!a oblongata (YoKOYAMA).
10. Do.
11. Trichotropis (Iphinoe) unicarinata
(BRODERIP et SOWERBY).
PLATE 33.
= Trapezium ventricosum YOKOYAMA
(Monotype). Otake.
Cardium braunsi TOKUNAGA. Otake.
Diplodonta usta GOULD. Otake.
Venericardia cipangoana YOKOYAMA. Otake.
/Chama semipurpurata LISCHKE. Otake.
Venericardia toneana YOKOYAMA
(Holotype). ShitO.
Do. (Paratype). Do.
Crassatella nana ADAMS et REEVE. Kioroshi.
Montacuta oblongata YOKOYAMA
(Paratype). OjL
Do. (Ho1otype). Do.
TrichotrojJis zmicarinata BRODERIP. Shito.
12. Myurella (Pristiterebra) bi/rons = Terebra tsuboiana YOKOYAMA
(HINDS).
(Paratype ).
13. Do.
14. Corbicula (5. s.) japonica PRIME.
15. Do.
16. Tr.7pezium (Neotrapezium) nipponicum
YOKOYAMA.
17. Do.
18. Corblcula (s. s.) japonica PRIME.
19. Do.
= Do. (Holotype).
= Corbicula sandal/ormis YOKOYAMA
(Holotype ).
Do. (Paratype).
/Trapezium liratum REEVE.
T. nipponicum YOKOYAMA (Holotype).
= Corbicula liObelti YOKOYAMA (Holotype).
= Do. (Paratype).
Kioroshi.
Sagami Sea
(Liv.)
Shito.
Do.
Otake.
Otake.
Shito.
Do.

Jour. Sci. ColI., Vol. XLIV,. Art. 1, PI. XIII. PI. 33
.J. Ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa .

Jour. Sc· I. ColI., Vo. I XLIV, Art. 1 , PI . XIV.
1. Ishizaki del. M. Yokoyama. .. Fossil ; from Kazusa a n d Shimosa.
PI. 34

Jour. Sci. ColI., Vol. XLIV, Art. 1, PI. XV.
]. Ishizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa.
PI. 35

PLATE 36.
1, 2. Glycymeris (s.s.) vestita (DUNKER). Pectunculus vestitus DUNKER. 6take.
3. Do. Do. Tega.
4. G. (s. s.) rotunda (DUNKER) (forma P. yamakawai YOKOYAMA (Holoyamakawai
YOKOYAMA). type). Shit6.
5. Do. Do. (Paratype). Do.
6, 7. G. (s. s.) yessoensis SOWERBY. P. yessoensis (SOWERBY). ' Shit6.
8, 9. G. (Tucetilla) pilsbryi YOKOYAMA. P. pilsbryi YOKOYAMA. Shit6.

Jour. Sci. CoIL, Vol. XLIV, Art. 1, PI. XVI. PI. 36
). lshizaki del. M. Yokoyama: Fossils from Kazusa and Shimosa.
5

1-3. Glyeymeris (Glyeymeris)
(DUNKER).
PLATE 37.
vestita / Pectuneulus albolineatus LKE.
4. Saeeella con/usa (HANLEY). Lgda con/usa HANLEY.
5. Limopsis (Oblimopa) /orskalii A. ILimopsis woodwardi AD.
ADAMS.
6take.
Tega.
Tega.
6. L. (EmPleeonia) ClImingii A. ADAMS. = L. areolata YOKOYAMA (Ho!otype). Shito.
7. Do. = Do. (Paratype). Do.
8. Pseudogrammatodon obliquatlts (YoKO·
YAMA).
9. Do.
10. Yoldia (Cnesterium) l10tabilis YOKO­
YAMA.
= Cueullaria orientalis
(Ho!otype).
= Do. (Paratype).
YOKOYAMA Shito.
Do.
Yoldia notabilis YOKOYAMA (Ho!otype).
6take.
11, 12. Coptothyris grayi (DAVIDSON). Eudesia grayi DAV. ShitO.
13. Hemithyris psittaeea WOOdW01·di A. Rhyne/zonella psittaeea CHEMN. var.
ADAMS. woodwardi AD. Shito.
14. Lithophaga sp. indet. ? Lithophaga zitleliana DKR. 6take.
15. Polynemamussium intl/seostalum (Yo­
[

1. Za/ra sinensis (SOWERBY).
2: Ergalatax contractus (REEVE).
3. Engina menkeana (DUNKER).
4. Purpura
DA).
(Mancinella) siro (KURO'
5. Leptoconchus striatus RUPPEL.
6. Retusa lineolata YOKOYAMA.
7. Bittiuni acutangulum YOKOYAMA.
8. B. alutaceum GOULD.
9. Colubral'ia castanea KURODA et HABb:.
10. Drupa (Morula) biconica (BLAIN'
VILLE).
PLATE 38.
= Columbella (Anachis) awalla YOKO-
YAMA (Monotype). Numa.
Ocinebra contracta (REEVE). Numa.
IEngina acuminata (REEVE). Numa.
IPurpura (Thalessa) bitubercularis
LAMARCK. Numa.
/ Leptoconchus rostratus A. ADAMS. Numa.
Retusa lineolilta YOKOYAMA (Mono·
type). Numa.
Bittium acutangulum YOIWYAMA
(Monotype). Numa.
=Cerithiopsis hilaris YOKOYAMA
(Ho!otype). N lima.
/Triton (Epidromus) obscurus REEVE.' Nlima.
I Purpura (Cuma) "ugosa (BORN). Numa.
11. Cypraea (Lyncina) vitellus vitellus /Cypraea carneola LINNE.
LINNE.
12. Crepidula (s. s.) gravispinosa KURODA ICrepidula aculeata (GMELJN).
et HABE.
13. Bittium alutaceum GOULD.
14. Spirorbis tricarinatus (YoKOYAMA).
15. Cyrbasia (J oculator) pZllvi/ormis
(YoKOYAMA).
16. Cymatium (Monoplex) echo KURODA
et HABE.
17. Pomatoceros sp.
18. Hydroides reticulatus (YoI

Jour. Sci. ColI., Vol. XLV, Art. 1, PI. II. PI. 39
21
M. Yokoyama: Mollusca from the Coral-Bed of Awa.

PLATE 40.
1. Hiatella awana (YoKOYAMA). Petneola awana YOKOYAMA.
2, 3. Anisodonta (Fulcrella) gouldii (A. Baslerotia gOl/ldli CA. ADAMS).
ADAMS).
4. lrus ishibashianus KURODA et HABE. /VeneruPis insignis DESHAYES.
5. 6. Barbatia (s. s.) steamsii (Pn.sBRY). Area stearnsii PU.SBRY.
7. Chama CPseudoehama) retroversa Chama retroversa LISCHKE.
LISCHKE.
Numa.
Numa.
Numa.
Numa.
Numa.
8. Cle11a delicatula (PILSBRY). Codakia bella CONRAD var. delicalula
Pn.SBRY. Numa.
9. Coralliophaga coralliophaga (GMEJ.IN). =Coralliophaga coralliophaga (CHEM-
NITZ). Numa.
10. Septiler bilocularis Pilosus (REEVE). IMytilus curvalus DUNKER.
Numa.
11. Lithophaga (Leiosolenus) lima LAMY. I Lithophaga nasuta (PHILIPPI). Numa.
12. Cardila leana DUNKER.
(Cardita crassicostata LAMARCK. Numa.
13. Lima (s. s.) sowerbyi sowerbyi (Lima lima (LINNE).
Numa.
14,.
DESHAYES.
Volsella (s. s.) nipPonica OYAMA. I Modiolaria semigranala REEVE. Numa.

Jour. Sci. CoIl., Vol. XL V, Art. 1, PI. III. PI. 40
M. Yokoyama: Mollusca from the Coral-Bed of Awa.

.,. ,
(

1. "Nesobornia "
YAMA).
nipPonica (YOKO.
2. "N." trigonalis (YoKOYAMA).
3. Byssobornia striatissima (SOWERBY).
4. Do
5, 6. Plicatula Izorrida DUNKER.
·7. Aequipecten (Excelliclzlamys) spectabilis
(REEVE).
8. Mellitcryx pllncticulata (YOKOYAMA).
9. Do.
10. Chlamys (ComPtopal{ium) quadrilirata
(LISCHI

Jour. Sci. CoIl., Vol. XLV, Art. 1, PI. IV. PI. 41
M. Yokoyama: Mollusca from the Coral-Bed of Awa.

1-4. Lopha (Dendostraea) erenuli/era
REEVE.
S. Area arabica PHILIPPI.
6. Acar plieata (DILLWYN).
7. Striarea (Didimacar)
(REEVE).
tenebriea
PLATE 42.
Ostrea crenuli/era REEVE. Numa.
= Al'ea kraussi PHILIPPI. Numa.
/ A. (Barbatia) domingensis LAMARCI{. Numa.
A. (n.) tenebriea REEVE. Numa.
8. Isognomon marsupialis (RODING). =Perna marsupium LAMARCK. Numa.
9. Eu/enella pupoides (A. ADAMS) var. Fenella pupoides A. ADAMS.
10. Rissoina (Phosinella) media awana
YOKOYAMA.
11. Alvania eoneinna A. ADAMS.
12. Spondylus cruentus LISCHKE.
13. Barbatia (s. s.) bieolorata (DILLWYN).
14. Triphora sp.
15. Philbertia le"lekarti (DUNKER).
16. Miralda (s. s.) gemma (A. ADAMS).
17. Pisania (Japeuthria) /errea (REEVE).
18. Batillaria (s. s.) zonalis (BRUGUIERE).
19. Ctenoides lisehkei (LAMY).
20. Neoeollonia pi/ula (DUNKER).
Numa.
Rissoina (Phosinella) eaneellata
PHILIPPI var. awana YOKOYAMA. Numa.
Rissoa (Alvania) eoncinna A. ADAMS. Numa.
Spondylus eruentus LISCHKE.
= Area (Bal'batia) /usea BRUGUIERE.
K6yatsu.
Numa.
? Tri/oris exilis DUNKER. Numa.
/Clathurella eentrosa PILSBRY. Numa.
Odostomia (Miralda) gemma (A.
ADAMS). Numa.
Euthria /errea (REEVE). Numa.
Potamides (Batillaria)
BRUGUIERE.
zonalis
K6yatsu.
= Lima dunkeri SMITH.
Leptothyra Pilula (DUNKER).
21. Scissurella (s. s.) staminea (A. ADAMS). jScissltrella turbinata (A. ADAMS).
22. Scintilla solidula DESHA YES.
Scintilla solidula DESHA YES.
23. Fabulina (s. s.) minuta (LISCHKE).
/Tellina iridella MARTENS.
Numa.
Numa.
Numa.
Numa.
Numa.

Jour. Fac. Sci., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. XL VI. PI. 43
24
M. Yokoyama: Mollusca from the Upper Musashino of Tokyo and its Suburbs.
5

1. Epitonium (Turbiniscala) rePlical1lm
(SOWERBY).
PLATE 44.
2. E. (PaPyriscala) yokoyamai SUZUKI +S. lyra (SOWERIW).
et IcHIMURA (Holotype).
3. Amaea ojiensis (YoKOYAMA).
4. Nodiscala rissoinaeformis (YoKo-
YAMA).
5. Epitonium sp.
6. Tiberia fasciata (DUNKER).
7. Syrnola (Hoonsyrnola) intl/tbida
(YoKOYAMA).
8. Balcis shibana (YOKOYAMA).
9. Syrnola (5. 5.) toshimana (YO!W­
YAMA).
10. Turbonilla (Asmunda) affectuosa
( YOKOYAMA).
11. Odostomia (5.5.) optata YOKOYAMA.
12. Actaeopyramis lectissimoides (YOKo­
YAMA).
13. Cllrysallida (5.5.) shibana YOKOYAMA.
14 .. Miralda (Evalina) nishiana (YOKO'
'lAMA).
15. Odostomia (5.5.) fujitanii YOKOYAMA.
16. Syrnolll (s.s.) kurumana (YOKO.
YAMA).
17. Chrysallida (Besla) bicinctella (YOI\o­
'lAMA).
18. Kleinella amicalis (YOKOYAMA).
19. Turbonilla (5. 5.) keiskeana YOKO-
YAMA..
20. T. (s.s.) muitigyrata DUNKER.
21. T. (5.5.) pseudocura NOMURA.
22. T. (paramormula) semicolorata
YOKOYAMA.
23. T. ( Pyrgolampros) subplanicostata
YOKOYAMA.
24. T. (s.s.) edoensis YOKOYAMA.
25. Charonia sauliae (REEVE).
26. Turboni!la (Dltl1keria) shigeyasui
YOKOYAMA.
27. lfmbonium (Suchium) costalum
(KIENER).
Scala replicata (SOWERBY). Kuruma-ch6.
S. (Acrilla) ojiensis
(Holoty pe).
S. rissoinaeformis
(Holotype ).
YOI\oYAMA Oji.
YOKOYAMA
Kuruma-ch6.
Oji.
? S. pulchen'ima (SOWERBY). Oji.
=Pyramidella (Tiberia) ebarana YOIW-
YAMA (Monotype). Shinagawa.
P. (Syrllola?) intuTbida YOI\OYAMA
(Holotype). Oji.
Eulima (Leiostraca) shi/Jana YOKO-
YAMA (Holotvpe).. Kuruma-ch6.
Pyramidel/a (Syrnola) toshimana
YOKOYAMA (Ho!otype). Oji.
Odostomia (Egilina) affectuosa YOl\o-
YAMA (Monotype). Kuruma-ch6.
O. (Odostomia) oplata YOKOYAMA
(Monotype). Oji.
O. (Odetta) lectissimoidcs YOKO-
YAMA (Monotype). Kuruma-ch6.
O. (Besla) shibana YOKOYAMA
(Ho!otype). Do.
O. (Menestho) ni.

Jour. Fac. Sci., Imp. Univ. Tokyo. Sec. II, Vol. I, PI. XLVII. PI. 44
M. Yolwyama: Mollusca from the Upper Musashino of Tokyo and its Suburbs.

Jour. Fac. SCi., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. XLVIIT.
M. Yokohama: Mollusca from the Upper Musashino of Tokyo and its Suburbs.
PI. 45

1, 2. Kellia" pmnila S. WOOD."
3. Solamen diaphana (DALL).
4. Eryeina erassa (YoKOYAMA).
PLATE 46.
Kellia pumila S. WOOD.
/Crenella spectabilis A. ADAMS.
5. Do. Do. (Paratype).
J1IIontacuta (?) erassa YOl{O­
YAMA (Holotype).
6. Brachidontes (Areuatula) senhousia = M"odiola sen!zausii REEVE.
(BENSON).
Kuruma-cho.
Kuruma·cho.
Shinagawa.
Shinagawa.
Shinagawa.
7. Cuspidaria (Gardiomya) gouldiana jCuspidaria (Gardiomya) gOllldiana
septentrionalis KURODA. HINDS. Shinagawa.
8, 9. Lutraria sieboldi REEVE.
10. Lingula rostrum SHAW.
11. Crssatellites (s. s.) nantes (ADA.MS et
REEVE).
= Lutraria sieboldtii DESHA YES.
=Lingula !zians SWAINSON.
Grassatella nana A. ADAMS
REEVE.
et
Shinagawa.
Oji.
Shinagawa.

Jour. Fac. Sci., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. XLIX. PI. 46
1
6
M. Yokoyama: Mollusca from the Upper Musashino of Tokyo and its Suburbs.
2

PLATE 47.
1, 2. Luci11a (s. s.) steal'1lSialla OYAMA, I Loripes philippiana (REEVE).
n.n.
3, 4. Protothaca (Cal/ithaca) adamsi I Venlls rigida Gou LD.
(REEVE).
5. f oamlisiella lllnaris (YoEOY AMA). Diplodonta lunaris YOKOYAMA
(Paratype ).
6. Do. DJ. (Ho!otype ).
7. Alvcnills ojianlls (YoKOYAMA). Kellia (?)
(Ho!otype).
8. Do. Do. (Paratype).
ojiana YOKOYAMA
9. Thyasira (s. s.) tokllnagai KURODA /Thyasira gouldii (PHILIPPI).
et HABE.
10. Solemya (Acharax) japonica DUNKER. = Solemya yamakawai
(Holotype).
YOKOYAMA
Kuruma·cho.
Oii.
Shinagawa.
Do.
Oii.
Do.
Shinagawa.
OiL

Jour. Fac. Sci., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. L. PI. 4'7
M. Yokoyama: Mollusca from the Upper Musashino of Tokyo and its Suburbs.

1. Acteocina (Didontoglossa) koyasensis
(YOKOYAMA).
2. A. (s. s.) dulcis (YoKOYAMA).
3. Decorifer gordon is (YoKOYAMA).
4. Retusa (s. s.) cucurbitina YOKOYAMA.
5. Eufenella ichikawensis (YoKOYAMA).
6. Cingulina (s. s.) cingulata (DUNKER)
var.
7. Cerithimn (Proclava) kochi
( PHILIPPI).
8. Liitorinopsis (s. s.)
(PHILIPPI).
intermedia
9. Assiminea (s. s.) japonica MARTENS.
10. Odostomia . (Megastomia) rusticella
YOKOYAMA.
11. Eufenella pupoides (A. ADAMS).
12. Do.
13. Stenothyra edogalVensis (YoKOYAMA).
14. Spirorbis perplanorbis (YOKOYAMA).
15. Eulima (s. s.) oZ.lwai YOKOYAMA.
16. Sinusicola fi!iola (YoKOYAMA).
17. Solen gouldi CONRAD.
PLATE 48.
70rnatina kovasensis YOKoyAMA
(Monotype). Koyasu.
T. dulcis YOKOYAMA (Monotype). Shimo·Sueyoshi.
Retusa gordonis YOKOY AMA
(Monotype). Matsudo.
R. cucurbitina YOKOYAMA
(Monotype). Koyasu.
Rissoa ichikawensis YOKOYAMA
(Holotype). Ichikawa.
Turbonilla (Cingulina) cingulata
DUNKER. Ichikawa.
Cerithiopsis POlltiriS YOKoYAMA
(Holotype). Ichikawa.
Liltorina adonis YOKOYAMA
(Monotype). Koyasu.
L. lucida YOKOYAMA (Mono·
type). Koyasu.
Odostomia (Heida) rustic ella YOIW·
YAMA (Monotype). Ichikawa.
Fenella perpupoid(s YOKOYAMA
(Paratype). Koyasu.
Do. (Holotype). Shimo·Sueyoshi.
Rissoa (Amphithalamus) rdogawemis
YOKOYAMA (Monotype). Ichikawa.
Vermetus perplanOibis YOKOYAMA
(Monotype). Koyasu.
Eulima (SlIbularia) ozawa; YOKO'
Y A \1A (Monotype). Ichikawa.
Turbonilla (Careliopsis) filiola
YOKOYAMA (Monotype). Koyasu.
Solell gould; CONRAD. Ichikawa.

Jour. Fac. Sci., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. L1. PI. 48
M. Yokoyama: Mollusca from Western Shimosa and Southern Musashi.

1. Martesia cupula (YoKOYAMA).
2. Teredo sp.
3, 4. Thyasira (s. s.) tokunagai KURODA
et HABE.
5. Cryptomya (Venatomya) tachibanensis
YOKOYAMA.
6. Donax (Chion) kiusiuensis PILSBRY.
7, 8. Fabulina (Moerella) peitaihoensis
(GRABAu et KING).
9, 10. Chione (Veremolpa) micra
PILSBRY.
11. Thyaslra (Conchocele) (bisecta var.?)
disjuncta GABB.
12. Gomphina (Macridiscus) veneriformis
(LAMARCK).
PLATE 49.
Pholas cupula YOKOYAMA. Koyasu.
Teredo sp. Koyasu.
Thyasira gouldii PHILIPPI. Namamugi.
Cryptomya tachibanensis YOKOYAMA
(Ho!otype). Ichikawa.
=Donax paululus YOKOYAMA. Matsudo.
/Tellina pallidula LISCHKE. Koyasu.
/Chione crenifera SOWERBY. Ichikawa.
Thyasira bisecta CONRAD. Namamugi.
Gomphina melanaegis ROEMER. Ichikawa.

Jour. Fac. Sci., Imp. Univ. Tokyo, Sec. II, Vol. I, PI. LH. PI. 49
I· 1
2
M. Yokoyama : Mollusca from Western Shimosa a nd Southern Musashi.