272 NORTH AMERICAN MESOZOIC INVERTEBRATA. [BULL. 102. Tancredia (Lyoett) "M. & H. (1865.) Paleont. Up. Missouri, Smitlison. Cont. Knowl., vol. 14, No. 172, pp. 95, 96. Wash., 1865. Meek & Hay den. ? aequilateralisn. s. M. & H. (1860.) Proc. Acad. Nat. Sci., Phila., for 1860, p. 183. Pbila., 1861. Meek & Hay den. Formation: Jurassic. Location: Southwest base of Black hills, Nebr. ? aequilateralis M. & H. (1865.) Paleont. Up. Missouri, Smitlison. Cout. Knowl., vol. 14, No. 172, pp. 96, 97, pi. 3, fig. 8. Wash., 1865. Meek & Hay den. Formation: Jurassic. Location: Southwest base of the Black hills. americana (M. & H.) Meek. (1876.) Rep. U. S. Geol. Sur. Terr., vol. 9, pp. 142-144, pi. 38, figs. la-h. Wash., 1876. F. B. Meek. Formation: Cretaceous. Location: Mouth of Judith river, on the Upper Missouri, Cache la Poudre, in Colorado. americana (M. & H.) White. (1879.) Eleventh Ann. Rep. U. 8. Geol. and Geogr. Sur. Terr., p. 182. Wash., 1879. C. A. White. Formation: Cretaceous. Location: Valley of Cache la Poudre, and at mouth of St. Vrain creek, Colo. americana (M. & H.) Whiteaves. (1885.) Geol. andNat. Hist. Sur. Can., Cont. Can. Paleont., vol. 1, pt. 2, p. 39. Montreal, 1885. J, F. Whiteaves. Formation: Cretaceous. Location: Berry creek, section 31, township 25, range 12, west of the fourth principal meridian, Canada. americana (M. & H.) Whiteaves. (1889.) Geol. and Nat. Hist. Snr. Can., Oont. Can. Paleont., vol. 1, pt. 2, p. 175. Montreal, 1889. J. F. Whiteaves. Formation: Cretaceous. Location: Sounding creek, township 30, range 8, west of the fourth principal meridian, Northwest Territory. bulbosa n. s. Whitfield. (1877.) U. S. Geogr. and Geol. Sur. Rocky Mt. Region Prelim. Rep. Paleont., Black Hills, p. 22. Wash., 1877. R. P. Whitileld. Formation: Jurassic. Location: East of Belle Fourcho, Black hills, Dak. bulbosa Whitfield. (1880). Rep. Geol. Black Hills of Dak., pp. 370, 371, pi. 6, figs. 1-3. Wash., 1880. R. P. Whitfield. Formation: Jurassic. Location: East of the Belle Fourcho river, near Bear Lodge butte, Black hills. ? ccelionotus White. (1879.) Eleventh Ann. Rep. U. S. Geol. and Geogr. Sur. Terr., p. 182. Wash., 1879. C. A. White. Formation: Cretaceous. Location: The Cache la Poudre, ton miles west of Greeley, Colo. Tancredia Continued. ? coBlioiiotus n. a. White. (1879.) Eleventh Ann. Rep. U. S. Geol. and Geogr. Sur. Terr., p. 288, pi. 5, figs. 2o-d. Wash.,1879. C. A. White. Formation: Cretaceous. Location: Ten miles west of Greeloy, Colo. corbuliformisn. s.Whitfield. (1877). U. S. Geogr. and Geol. Sur. Rocky Mt. Region; Prelim. Rep. Paleont., Black Hills, pp. 21, 22. Wash., 1877. R. P. Whitfield. Formation: Jurassic. Location: East of Belle Fourche, Black hills, Dak. corbuliformis Whitfield. (1880.) Rep. Geol. Black Hills of Dak., p. 370, pi. 6, figs. 5-8. Wash., 1880. R. P. Whitfield. Formation: Jurassic. Location: East of the Belle Fourche river, near Bear Lodge butte, Black hills. extensa n. s. White. (1883.) Twelfth Ann. Rep. U. S. Geol. and Geogr. Sur. Terr., pt. 1, p. 150, pi. 38, fig. 4o. Wash., 1883. C. A. White. Formation: Jurassic. Location: North side of Bull lake fork, Southeastern Idaho. ? inornata (M. & H.) Whitfield. (1880.) Rep. Geol. Black Hills of Dak., pp. 368, 369, pi. 6, figs. 9-13. Wash., 1880. R, P. Whitfield. Formation: Jurassic. Location: East of the Belle Fourche river, near Bear Lodge butte, Black hills. poatica n. s. Whitfield. (1877.) U. S. Geogr. and Geol. Snr. Rocky Mt. Region: Prelim. Rep. Paleont., Black Hills, pp. 22, 23. Wash., 1877. R. P. Whitfield. Formation: Jurassic. Location: East of Belle Fourcho, Black hills of Dakota. postica Whitfield. (1880.) Rep. Geol. Black Hills of Dak., pp. '371, 372, pi. 6, fig. 14. Wash., 1880. R. P. Whitfield. Formation: Jurassic. Location: East of the Belle Fourche river, Black hills. warrenana n. s. M. & H. (1860.) Proc. Acad. Nat. Sci., Pbila., for 1860, p. 183. Phila., 1861. Meek & Hayden. Formation: Jurassic. Location; Southwest base of Black hills, Nebr. warrenana M. & H. (1865.) Paleont. Up. Missouri, Smitlison. Cont. Knowl., vol. 14, No. 172, p. 96, pi. 3, fig. 7. Wash., 1865. Meek & Hayden. Formation: Jurassic. Location: Southwest base of the Black hills. warrenana (M. & H.) Whitfield. (1880.) Rep. Geol. Black Hills of Dak., p. 372, pi. 6, fig. 4. Wash., 1880. R. P. Whitfield. Formation: .Tura'ssic. Location: Red water valley, southeast of Warren peaks, Black hills.
BOYLE.] NORTH AMERICAN MESOZOIG INVERTEBRATA. 273 Tapes [Megerle] Shumard. (1859.) Traus. Acad. Sci., St. Louis, vol. 1,1856-1860, p. 601. St. Louis, 1856-1860. B. F. Shumard. conradiana n. 8. Gabb. (1864.) Gcol. Sur. Cal. Paleont., vol. 1, p. 169, pi. 32, fig. 282. Phila., 1864. W. M. Gabb. Formation: Cretaceous. Location: Alizos creek, near Fort Tejon, Cal. - hilgardi n. s. Shumard. (1859.) Trans. Acad. Sci., St. Louis, vol. 1, 1856-1860, p. 601. St. Louis, 1856-1860. B. F. Shumurd. Formation: Cretaceous. Location: Bluffs of Red river, Latnar, and Fannin counties, Tex. hilgardi (Shum.) Gabb. (1869.) Geol. Sur. Cal. Paleont., vol. 2, pp. 265, 266, pi. 36, fig. 13. Phila., 1869. W. M. Gabb. Formation: Cretaceous. Location: Sierra do las Conchas, near Arivechi, Sonora, Mexico. hilgardi (Shumard) White. (1883.) Twelfth Ann. Bep. U. 8. Geol. aud Geogr. Sur. Terr., pt. 1, p. 22, pi. 16, figs. 3
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