LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

106 3WJWEH CRETACEOUS DEPOSITS IN CALIFORNIA AND OREGON
Aucella piriformis LAHUSKK, Lea Aueellai, p. 22, pi. 5, figa. 3-7: Lower Neocomisn,
Russia—PATLOW, SOT, Impcr. Nat, Mwcou, Nouv. Mem. T. 17, 1907, p. 63,
pi. 5, fifp. 20-22; zone of Polyptychic yalyplychm Pavlow; Lower Neoeomian
of Russia,
This species is found in the middle part of the Paskenta group in its type district,
associated with Ntacomilt* jenAiim, species of Attferia (*.*.), Berriatella, and
Thurmannia jmskentae, nay. It has also been found at & higher level in the Mc-
Carthy Creek section—"tone P"—associated with Lytaccran saiurnalt and a large
cycad leaf. Ita occurrence here is in tbe middle third of the so-called "Aucctfa
crcmtcofh's zone," but it is not confined to this part of the section, this is the
largest of tbe aucellan species found in these beds,
Aucella nutijarmis Pavlow
(PlU* a, AsWW 7, B.«)
Aucella nuciformia PAVLOW. SOT, Iroper. Nat. Moacou, Nouv. Mem., T. 17, 1907,
p. 52, pi, 3, Bp. 27a, b, c; figs. 28a, b, c: Lower Neoeomian, tone of iubcrasptdilt*
stcnomphaliis Pavlow, Govt, of Simbirsk, Russia.
This Bpeeies has not been recorded before from the Lower Cretaceous of California,
but it liaa been found in tbe type district of tho Paskenta group at three
different points, and at two different horizons. It occurs in tbe basal sandy beds
of this group at a locality 2 miles northwest of Paskenta, and in the same «one a
quarter of a mile cast of Heodereoa'a house on McCarthy Creek. It has also been
found at a higher level is this section, just beneath the zone of Neocomites jenkinsi,
and with A. piriformis a little above it. It is not abundant at any place, but it is
one of the forma recorded by Pa-vlow from the zone of Siibcrarpeditea aitnompAoJus
in the Lower Cretaceous of Russia.
Aucella kcyicrlijigi Lahusen
Aucella keyiertinei LAtrosBN, Mem, Com. Geol., St. Petersburg, vol. S, no. 1, 1888,
p. 21, 40, pi, 4, figs. 18-23; Lower Neoeomian, Russia.
Aucella craseie-ollu, var. STAKTON, U, 8. Geol. Surv., Bull. 133, 1S95, p. 45-47, pi. 5,
figa. 12,13; "aspecimen that approaches Aucella pioehii var. ovata" Stanton.
AwxUa keyierlingi, PAVLOW, See. Imper. Nat. Moacou, Nouv, Mem., T, 17, 1907,
p. 62, pi. 5, figs. 17aj b, c, IS, 16: Lower Neocomi&n, Govt, of Simbirsk, Russia;
sane of Sufi eras pedtJes Jt^nomptaiiH (Pavlow).
Stanton (1896, p. 46} states that Ms figures (18BS, pi. S, figs. 12 and 13) are much
like Lahuaen's figure of A. keyterlinoi, whereas Pavlow has regarded them as identical,
In the type district of the Paskenta group this species has been found 600 to
800 feet above the base, associated with NcocorAiles tlippi, nov. , Lytacews salvmale,
and Acroteulhit onoensie, nov. It seems to be rather rare, but it is recorded here
as ono of the forms found in Russia in the zone of Siibcraspidites sienamplMlut
(Pavlow). It is believed to have been found also on the west border of the Benryeaia
Valley. R. D. Reed sent a specimen probably of the same species to the California
Academy of Sciences from Pasqual Creak, 3 miles south of Lompoc, Santa Barbara
County, California.
Aucella lahustni Pavlow
{Pluto 8, finiTM id t)
Aucella lahiueni PAVLOW, SOD. Impcr. Nat. Moacou, Xouv. Mem., T, 17,1967, p. 51,
pi. 3, figa. 16-23.
In his description of this species Pavlow (1907, pi. figs. 21a, b, c) has illustrated
a form which ia said to occur in Naocomian beds at Kaahpour, Government of Sim-