GEOLOGICAL SURVEY

BOYLE.] NORTH AMERICAN MESOZOIC INVERTEBRATA. 205
Oligoptych[a] subgen. Meek. (1876.)
Rep. U. S. Geol. Terr., vol. 9, p. 283. Wash.,
1876. F. B. Meek.
Olivella (Swains) Gabb. (1N64.)
Geol. Sur. Cal. Paleont, vol. 1, p. 100. P'jila.,
1864. W. M. Gabb.
mathewsonii E. s. Gabb. (1864.)
Geol. Sur. Cal. Paleont., vol. 1, p. 100, pi. 18, fig.
53. Phi la., 1861 W.M.Gabb.
Formation: Cretaceous.
Location: Northeast of Martinez; also at Alizos
creek, near Fort Tejon, Cal.
Omphalophacus ? tenellus Ehrenberg.
(1854.)
Mikrogeologie, Taf. 32, fig. 34. Leipzig, 1854.
C. G. Ehrenberg.
Formation: Cretaceous.
Location: Mississippi region.
Omphiscola (subgen. Raf.)Meek. (1876.)
Rep. U. S. Geol. Sur. Terr., vol. 9, p. 533. Wash.,
1876. F. B. Meek.
Ophioderma White. (1883.)
Twelfth Ann. Rep. U. S. Geol. and Gcogr. Sur.
Terr., pt. 1, p. 8. Wash., 1883. C. A. White.
? bridgerensis (Meek) White.
(1882.)
Twelfth Ann. Rep. U. S. Geol. and Geogr. Sur.
Terr., pt. 1, pp. 8,9, pi. 12, fig. 12a. Wash.,
1883. C. A. White.
Formation: Cretaceous.
Location: "Last foot of Bridge peak, four miles
north of Fort Bllis, Mont."
Opis (Defr.) Conrad. (1858.)
Jour. Acad. Nat. Sci., Phila., vol. 3, 2d ser.,
1855-1858, p. 327. Phila., 1855-1858. T. A.
Conrad.
(Defr.?) Gabb. (1876.)
Proc. Acad. Nat. Sci., Phila., for 1876, p. 311.
Phila., 1876. W.M.Gabb.
bellan.'e. Conrad. (1858.)
Jour. Acad. Nat. Sci., Phila., vol. 3, 2d ser., 1855-
1858, p. 327. Phila., 1855-1858. T.A.Conrad.
Formation: Cretaceous.
Location: Owl creek, three miles north of the
town of Ripley, Miss.
bicariuata n. s. Conrad. (1858.)
Jour. Acad. Nat. Sci., Phila., vol. 3, 2d ser. 1855-
1858, p. 327. Phila., 1855-1858. T. A. Conrad.
Formation: Cretaceous.
Location: Owl creek, three miles north of the
town of Ripley, Miss.
conradiGabb. (1876.)
Proc. Acad. Nat. Sci., Phila., for 1870, p. 311.
Phila., 1876. W. M. Gabb.
Formation: Cretaceous.
vancouverensis n. s. Whiteaves.
(1879.)
f!ool. Sur. Can., Mes. Foss., vol. 1, pt. 2, pp. 158-
160, pi. 18, figs. 4, 4a. Montreal, 1879. J. F.
Wliiteiives.
Formation: Cretaceous.
Location: Southwest side of Beuman island.
Opis Continued.
vancouverensis Whiteaves. (1887.)
Geol. and Nat. Hist. Sur. Can., vol. 2, n. ser., 1886,
App. I, p. 112 B. Montreal, 1887. J.F.Whiteaves.
Formation: Cretaceous.
Location: West end of Lasqueti island (in the
strait of Georgia) near False bay.
vancouverensis Whiteaves. (1889.)
Geol. and Nat. Hist. Sur. Can., Cont. Can. Paleont.,
vol. 1, pt. 2, p. 155. Montreal, 1889. J.
F. Whiteaves.
Formation: Cretaceotis.
Location: West end of Lasqueti island (in the
strait of Georgia) near False bay.
Orbitulites texanus n. s. E o e m e r.
(1849.)
Tex. p. 392. Bonn, 1849. F. Roemer.
Formation: Cretaceous.
Location: On road from New Braunfels to Fredericksburg,
Tex.
texanus Roemer. (1852.)
Kreide von Tex. p. 86, Taf. 10, f gs. 7o-d. Bonn,
1852. F. Roemer.
Formation: Cretaceous.
Location: Wasp creok, on road from New Braunfels
to Freder icksburg, and upper course of the
Pedernales river, Tex.
Orthoceras(JBrug.)Gabb. (1869.)
Am. Jour. Conch., vol. 5, Phila.,1869,1870, p. 6.
Phila., 1870. W. M. Gabb.
blakei Gabb. (1869.)
Am. Jour. Conch., vol. 5, Phila., 1869,1870, p. 6.
Phila., 1870. W.M.Gabb.
Formation: Triassac.
Location: Nevada.
blakei (Gabb ?) Meek. (1877.)
Rep. Geol. Expl. Fortieth Parallel, vol. 4, pt. 1,
pp. 104,105, pi. 10, fig. 11. Wash., 1877. F.
B. Meek.
Formation: Triassic.
Location: Ridge above Coltonwood canyon, West
Humboldt range.
Orthoceratites (Brey.) Gabb. (1864.)
Geol. Sur. Cal. Paleont., vol. 1, p. 19. Phila.,
1864. W.M.Gabb.
blakei n. s. Gabb. (1864.)
Geol. Sur. Cal. Paleont., vol. 1, p. 19, pi. 3, fig. 1.
Phi la., 1864. W.M.Gabb.
Formation: Triassic.
Location: Buena Vista district, Humboldt mining
region.
Ostrea [Linn.] Say. 1820.
Am. Jour.Sci,,lst ser., vol.2,p. 42. New Haven,
1820. Thomas Say.
acuticosta n. s. N. & G. (1840.)
Bull. Roy. Acad. Sci. Bruxolles, Tome 7, pt. 2, pp.
213, 214, fig. 2. Bruxolles, 1840. Nyst & Galeotti.
Formation: Jurassic.
Location: Tehuacau, Mexico.