LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

375 loweb. chetaceous deposits in california and oregon
PL^TS 61.—CRETACEOCS FOSSILS FRQII CALIFORNIA
(I, la) Ptcutiacrioccras a ten for nov. Holotype. Length along aiphonul zone,
250 mm.; greatest diameter, 55 men.; diameter at a mailer end, 27 mm. (Note fragment
of smaller coil, displaced.) Found 200 feet below Mitchell ione, lower part
of Horsetown Group; Lot. 1651 (C. A. S.), south of Roaring River, Shasta County,
p. 206.
(2) Plyehaceras natrice nov. Holotype. Length 52 mm.; width across both arms,
23 mm. Mitchell zona, lower part of Horaetown Group; Loe. 1657 (C. A. 3.), north
of Roaring River, Shasta. County, p. 218.
(3, 3a) Peeudocriocerat ap. (3a) Reflected end view. p. 206.
(4) Hoplocrioeeras onaense nov. Holotype. Natural site. Found on Eagle
Creek, near Ono, Shasta County. (See PI. 53.) p. 202.