LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

254 LOWER CBETACEOtrS DEPOSITS IN CALIFORNIA. AND OREGON
PLATE 9— CBETACEOCB FOBSILS FKOM CALIFORNIA
(1) jVcriuea archimedin nov, Holotype. Height of spire (incomplete), 61 mm,;
width at base, 13 mm. Ono zone, lower part of Horsetown group; Loo, 1353(C. A, 8.),
Cottonwood Creek, near Ono, Shaata County, p. 132.
(2, 3) JVertwsfl Bp, indet, (2) Exterior of part of spire, (3) Another eaample,
showing interior spire. Lower beds of Horsetown group; Loe. 1353 (C. A, S.),
near Ono, Shasta County, p. 133.
(4-6) AfwAuro fa'onpufcito nov. (4) Holotype, Height (incomplete), 67 mm.;
width of body whorl, 25 mm. (5) Par a, typo, rear view, (6) Another example,
showing front view with triangulate aperture, and spur on outer part of wing.
Lower beds of Chico series; Loe. 1346 (C. A. S.), Cottonwood Creelc, Shasta County,
p. 134.
(7) PUuratemaria califarnica nov. Holotype. Height of spire, 24 mm,; width
of base, 43 mm. Argonaut tone, Horsetown group; Loc. 1348 (C, A, SO, Aldereon
Creek, Shasta County, p. 126.
(B, 9) Glaucania htsperia nov, Holotype. (8) Wax cast from rock mold.
(6) Rock cast of same, shell removed. Ono zone, lower part of Horsetown group;
Loe. 1353 (C. A. 8.), Cottonwood Creek, Shasta County, p. 132.
(10-13) TerebraUiJaiiuGinilinov. (10) Holotype, Length, 14 mm.; width, 16 mm.
(11) Paratype. Length, 16 nun.; width, 18 mm. (12,13) Other examples of same.
Lower part of Horsetown group; Barr zone, Loc. 1347 (C, A. S.), Mitchell Creek.
(14, 15) Tttebrstula h&nnatia nov. (14) Holotype, uppet valve; length (incomplete),
22 mm.; width, 24 mm. Length of lower valve (incomplete), 30 mm,
(15) Paratype, lower valve; length, 38 mm.; width, 35 mm. "Zone XJ", McCarthy
Creek, Tehama County, p. 05.
(16) Tercbratula durrelli nov. Holotype, enlarged. Length of lower (ventral)
valve, 25 mm.; width, 28 mm. Lower part of Horsetown group, Fiddler Creek, 10
miles south of Ono, Shasta County, p. 95.
(17, 18) Tsrebratclla flyuia nov. Holotype, (17) Ventral valve; length, 20 mm.;
width, 16 mm. Neptune zone, upper part of Horsetown group. Loc, 1659 (C. A. S.),
east branch of Hulen Creek, Shasta County. (18) Drawing showing thickness of
both valves, p. SH.