LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

369 loweb. chetaceous deposits in california and oregon
PLATE 59,—CRETACEOUS FOSSILS FBOU CALIFORNIA
(I) Ameeeras wyanutn nov. Holotype. Length of shell (incomplete), 95 mm,;
width of crosier, 09 mm.; thickness of body-chamber, 24 mm. Lower part of Horsetown
Group; probably from, or just above, the Ono zone, Cottonwood Creek, Shasta
County, p. 200.
(2, 2A, 3) /fefnifiacuiiifis neleus nov. (2) Holotype, a little enlarged, length
B1 mm.; greater diameter, 33 mm. Mitchell zone, lower part of Horsetown Group;
Loo. 1057 (C. A. S.), near Mitchell Creek, Shasta County. (2a) Section of shaft.
(3) Fragment of an example from a somewhat lower bed; lower Horsetown Group;
Lgq. 1601 (C. A. S.)j south of Roaring River, Shasta County, p. 221.
(4) Aeriocera* slarrkingi nov. Holotype (partly restored). A little below
Mitchell zone, lower part of Horsetown Group; Loc. 1661 (C. A. 8.), south of Hearing
River, Shaata County, (4a) Cross section of (4) at point indicated. Natural size,
p. 207.