LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

description of bpbcte3 127
part of the wborl; upper slope of the shell showing weaker spiral Bculpture crossed
obliquely by lines of growth inclined strongly backward; outer portion of body
whorl angulated by two prominent ridges, giving the whorl a biangular appearance.
The holotype gives the following measurements: width of base, 43 mm.; height,
of spire, 24 nun.; width of perforation, 21 mm. This specimen was found at Locality
1343 (Calif. Acad. Sci.), in the Argonaut zone on Alderson Creek about 2 miles south
of Ono, Shasta County. It was found associated with Gabbiocerat wintunium, nov.
The species recalls in its size and form, but not In sculpture, Pfewolomorto skidcgalenais
Whiteaves, from the cast end of Maude Island (Queen Charlotte Islands),
which appears to represent the Haida group of Mackenzie.
The species here described has some resemblance of PJeurotomaria ciaghestanica
Anthula (1900, pi. 4, figs. 7a, 7b).
FlBBUBELMDAE Ria&O
Pis&ureUa Bruguiferc
FittunUn bipunclala Stanton
FutvTella birmnetala STAJOTOK, U. S. Geol. Surv., Bull. 133, 1895, p. 63, pi. 13, fig. 8;
Cold fork of Cottonwood Creek, Tehama County.
"Shell small, elevated, conical, with the apex directed slightly forward and perforated;
aperture subeiicular; Burfaca cancellated, the sculpture consisting of strong
radiating ribs alternating with fine lines crossed in the interspaces between the ribs
by stronger concentric lines, so that the interspaces when magnified have the appearance
of radiating double rows of punctations.
"The aperture of the type specimen, the only one known, measures 4 mm. by 6
mm.; and itB height is about 3.5 nun."
The appearance of this name in the list of species given by Stanton (1805, p. 14)
from tts type locality, associated with Aucella crassicollit and other species characteristic
of tbe Paskenta gTOup, ia the best evidence of its proper horizon.
According to Stewart (1928, p. 313). the genus is probably Emarffinula. Stanton's
record of this species in the Shasta series is the only ono known.
EUOMFEUUDAX de Koninek
Ditcohdix Dnnier 1847
Note by