GEOLOGICAL SURVEY

248 NORTH AMERICAN MESOZOIC INVERTEBRATA. [BULL. 102..
Pteria Continued. . .
(Pseudoptera) sublaevis n. a. Whitfield.
(1877.)
U. S. Geogr. and Geol. Sur. Bocky Mt. Begion;
Prelim. Bep. Paleont. Black Hills, p. 29. Wash.,
1877. B. P. Whitfield.
Formation: Cretaceous.
Location: Old Woman's fork, Black hilla, Dak.
(Pseudoptera) sublsevis Whitfield.
(1880.)
Rep. Geol. Black Hills of Dak., p. 387, pi. 7,
fig. 6. Wash., 1880. B. P. Wbitfleld.
Formation: Cretaceous.
Location: Old Woman fork, Black hills.
Pterocerella n. g. Meek. (1864.)
Check List Invert. Foss. N, Am. Cret. and Jur.,
Smithson. Misc. Coll., vol. 7, No. 177, p. 30.
Wash., 1864. F. B. Meek.
tippana (Con.) Meek. (1864.)
Check List Invert. Foss. N. Am. Cret. and .Tur.,
Smithson. Misc. Coll., vol. 7, No. 177, p. 30.
Wash., 1864. F. B. Meek.
Formation: Cretaceous.
Location: Mississippi.
'tippana (Conrad) Gabb. (1868.)
Am. Jour. Conch., vol. 4, p. 147, pi. 14, fig. 20.
Phila., 1808. W. M. Gabb.
Formation: Cretaceous.
Pterodonta inflata (d'Orb.) Bamirez,.
(1880.)
An. Min. Fomento Bep. Hex., Tomo 3, p. 607,
Lam. 2-4. Mexico, 1830. S. Bamirez.
Formation: Cretaceous.
Location: Sierra Mojada, Mexico.
? sp. undet. Urquiza. (1882.)
An. Min. Fomcuto Bep. Mex., Tomo 7, p. 224,
fig. 13. Mexico, 1882. M. Urquiza.
Formation: Cretaceous.
Location: Cerro de losGuzmanes, Coalcoman district,
state of Michoacau, Mexico.
Pteroperna ? Whiteaves. (1878.)
Canadian Naturalist, vol. 8, n. ser., No. 7, p. 403.
Montreal, 1878. J. F. Whiteaves.
Formation: Jurassic.
Location: Iltasyouco river,
(?) Whiteaves. (1878.)
Geol. Snr. Can.; Rep. Prog, for 1876-1877, p. 153.
Montreal, 1878. J. F. Whiteaves.
Formation: Jurassic.
Location: Iltasyouco river, British Columbia.
Ptiloteuthis n. g. Gabb. (1869.)
Geol. Sur. Cal. Paleont, vol. 2, p. 128. Phila.,
1869. W. M. Gabb.
foliatus n. a. Gabb. (1869.)
Geol. Snr. Cal. Paleont., vol. 2, pp. 128,129, pl.19,
fig. 4. Phila., 1869. W. M. Gabb.
Formation: Cretaceous.
Location: Cotton wood creek, Shasta county, Cal.
Ptychoceras (d'Orb.) Shuniard. (1861.)
Proc. Boston Soc. Nat. Hist., vol. 8, 1801-1802,
p. 190. Boston, 1802. B. F. Shumard.
Ptychoceras Continued.
eequicostatus n. s. Gabb. (1864.)
Geol. Sur. Cal. Paleont., vol. 1, p. 74, pi. 13, fig.
20. Phila., 1864. W. M. Gabb.
Formation: Cretaceous.
Location: North fork of Cotton wood creek, Aldersons
gulch, and Eagle creek, Shasta county,
Cal.
aratus n. s. Conrad. (1874.)
Seventh Ann. Bep. U. S. Geol. and Geogr. Sur.
Terr., p. 455. Wash., 1874. T. A. Conrad.
Formation: Cretaceous.
Location: Trout creek, near Fairplay [Colo.].
crassum n. s. Whitfield. (1877.)
U. S. Googr. and Geol. Sur. Bocky Mt. Begion;
Prelim. Bep. Paleont. Black Hills, pp. 45, 46.
Wash., 1877. K. P. Wbitfleld.
Formation: Cretaceous.
Location: On Old Woman's fork, Black hills.
crassum Whitfield. (1880.)
Bep. Geol. Black Hills of Dak., p. 459, pi. 16,
figs. 3-5. Wash., 1880. B. P. Whitfield.
Formation: Cretaceous.
Location: On Old Woman fork, Black hills.
crassum (Whitfield) Stanton. (1887.)
Proc. Colorado Sci. Soc., vol. 2, pt. 3, for 1887, pp.
185,186. [Denver, 1888.] T. W. Stanton.
Formation: Cretaceous.
Location: About five miles north of the town of
Boulder, Colo.
meekanum n. s. Whitfield. (1877.)
U. S. Geogr. and Geol. Sur., Bocky Mt. region,
Prelim. Rep. Paleont. Black Hills, pp. 44, 45.
Wash., 1877.
R. P. Whitfield.
Formation: Cretaceous.
Location: On Beaver creek, Black hills.
meekanum Whitfield. (1880.)
Rep. Geol. Black Hills of Dak., pp. 457, 458, pi.
1C, fig8.1,2. Wash., 1880. E. P. Whitfield.
Formation: Cretaceous.
Location: On Beaver Creek, Black hills.
mortoni n. s. M. & H. (1857.)
Proc. Acad. Nat. Sci., Pbila., for 1857, p. 134.
Phil.a., 1858. Meek & Hayden.
Formation: Cretaceous.
Location: Great bend of the Missouri, Nebr.
mortoni (M. & H.) Meek. (1876.)
Bop. U. S. Geol. Sur. Terr., vol. 9, pp. 412, 413, pi.
20, figs. 4a-c. Wash., 1870. F. B. Meek.
Formation: Cretaceous.
Location: Great bend of the Missouri river, below
Fort Pierre.
mortoni (M & H.) Stanton. (1887.)
Proc. Colo. Sci. Soc., vol. 2, pt. 3, for 1887, p.
186. [Denver, 1S88.] T. W. Stanton.
Formation: Cretaceous.
Location: About five miles north'of the town of
Boulder, Colo.
texanus n. s. Shumard. (1861.-)
Proc. Boston Soc. Nat. Hist., vol. 8, 1861,1862, p.
190. Boston, 1802. B. F. Shumard.
Formation: Cretaceous.
Location: Near Chatfield point and Corsicana,
Navarro county, Tex.