GEOLOGICAL SURVEY

BOYLE.] NORTH AMERICAN MESOZOIG INVERTEBRATA. 93
Corbicula Continued.
obesa White. (1883.)
Third Ann. Rep. U. S. Geol. Sur., p. 437, pi. 23,
figs. 7-11. Wash., 1883. C. A. White.
Formation: Cretaceous.
Location: Valley of the South Platte and its
tributaries, Colorado.
obliqua n. s. Whiteaves. (1885.)
Gool. and Nat. Hist. Sur. Can., Cont. Can. Paleont.,
vol. 1, pt. 1, pp. 8, 9, pi. 1, flgs. 4, 4a, 6, Montreal,
1885. J. F. AVhiteaves.
Formation: Cretaceous.
Location: Bye-grass flat, Old Man river, Bow
river, eight miles west of Blackfoot crossing;
Upper Belly river, twenty-two miles above the
mouth of tho Waterton, and Little Bow river,
opposite the mouth of Snake valley, Canada.
occidentalis (M. ,& H.) Prime.
(1865.)
Mon. Am. CorbiculadfB (Recent and Fossil), Smithson.
Misc. Coll., vol. 7, No. 145, pp. 8, 9. Wash.,
1805. T. Prime.
Formation: Tertiary [Cretaceous].
Location: Bad lands of the Judith river, Nebraska
[Montana].
occidentalis (M.& H.)Meek. (1876.)
Rop. U. S. Geol. Sur. Terr., vol. 9, pp. 521, 522, pi.
40, figs. Ga-c. Wash., 1876. F. B. Meek.
Formation: Cretaceous.
Location: Bad lands of the Judith river, Montana,
on the Upper Missouri.
occidentalis (M. & H.) White.
(1879.)
Eleventh Ann. Rep. U. S. Geol. and Geogr. Snr.
Terr., pp. 208, 209. Wash., 1879. 0. A. Whito.
Formation: Cretaceous.
Location: Yampa valley, near Canon park, Colorado.
' occidentalis (M. & H.) White.
(1879.)
Eleventh Ann. Rep. U. S. Geol. and Geogr. Sur.
Terr., p. 216. Wash., 1879. C. A. White.
Formation: Cretaceous.
Location: Point of Rocks station, Wyoming.
occidentalis (M. & H.) White.
(1879.)
Eleventh Ann. Rep. U. S. Geol. and Geogr. Sur.
Terr., p. 219. Wash., 1879. C. A. White.
Formation: Cretaceous.
Location: Black Buttes station, Wyoming.
occidentalis (M. & H.) White.
(1880.)
Twelfth Ann. Rep. U. S. Geol. and Geogr. Sur.
Terr., pt. 1, p. 75, pi. 21, figs. 3