LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

138 lower cretaceous deposits in califoitkia and oregon
those in the Horsetown group, which are clearly different from any known in the
Knoxville enrids, or even in the older beds of the Shasta acnes, and which have thoir
nearest allies in trans- Pacific regions.
NACTILOIPEA
NATTOLTDAE Owen
Nautilus Linnaeus
^ToKfiiwa joii&i Andereon
(Plnlo 10, Bifur® 1)
IVAUWUS UXARNTU (?) GABB, Paleont. Calif., vol. 1, 18&4, p. S9, pi. 9, figs. 3,3a; Alderson
Gulch, Shasta County (not Nautilus te-xanus Shumard, Texas Cretaceous),
jVatiii'Iwff gabbi ANDEKSOM, Calif. Acad. Sci., Pr., 3d aer., vol. 2, 1902, p. 77, Cottonwood
Creole, Shasta County.
This species, doubtfully referred by Gabb to a Texas form, ia fairly common in
the upper part of the Horsetown group in the Cottonwood district. Most examples
seem to agree with Gabb's figures, and one may accept bis statement as to the type
locality. A large east of the species still retaining portions of tbe shell was found on
the west branch of HulonCreekat Locality 1668 (Calif, Acad. Sci.). It has a diameter
ot at least ISO mm., and a thickness of 70 mm. On parts of tho body-chamber the
shall shows the strong backward bend of the costal lines near the periphery of the
whorl, as shown In Gabb's figure. This specimen was found in tbe Perrin zona,
associated with CUonicerat modeste, nov. and AranfAopftte* pern'm", nov. in the upper
part of the Horsetown group. The septa show only a slight backward bend on the
periphery; tho umbilicus is small, but not closed; the siphonal tube is low, about 5
mm. above the base Of tho aperture—that is, above the top of the preceding whorl-
A smaller but incomplete example of the same epeoies is in the collection of Stanford
University; it was found by L. M. Clark on the Julian ranch, 8 miles southeast of
Lompoc, Santa Barbara County.
Waulilua tkarlcUensis Whi leaves
JVAUIIHW SUCTEFM* WHWEAVEB, Mea. FOBS., vol. 1, pt. 3,1884, p. 197, pi. 21, Welcome
Point, Skidegato Inlet, Queen Charlotte Islands (not PI. 11, figs. 1, la; Sucis.
Island),
Nautilus (Cymoiooerat} charloltensis WHITEAVBS, Mes, Pose,, pt. 4, 1000, p. 289;
Welcome Point, Maple Island—AMBERSOK, Calif. Acad, Sci., Pr., 3d aer.,
vol, 2, 1002, p. 78; Horsetown, Shasta County.
In the collections of Cretaceous fossils at Stanford University there is a large
fragmentary specimen of this apeciea found by the writer in a bard sandstone bed at
old Horsetown, in the lowest bed exposed there, Another example of the same
species has since been found near the mouth of H ulen Creek, encased in a boulder and
buried in a conglomerate of the lower Chico beds. It haa been transported from an
older zone to this conglomerate bed. Both examples agree well with the figure and
description givon by Whiteaves for those from Queen Charlotte Islands. In tho
California Academy of Sciences are two fragmentary but well-preserved specimens of
the species found by R. M. Kleinpell and E, Wayne Gall.ihcr on the north ehoro of
Bearskin Bay, Graham Island, and donated to the Academy of Sciences. The California
specimens differ in no important respects from these, although they arc somewhat
larger and possibly a Utile more inflated. The aperies ia perhaps related to
Wodiiliw jabffi, although it is more robust and occurs at ft higher level in the sequence.