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GEOLOGICAL SURVEY

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BOYLE.] NORTH AMERICAN MESOZOIG INVERTEBRATA. 273<br />

Tapes [Megerle] Shumard. (1859.)<br />

Traus. Acad. Sci., St. Louis, vol. 1,1856-1860, p.<br />

601. St. Louis, 1856-1860. B. F. Shumard.<br />

conradiana n. 8. Gabb. (1864.)<br />

Gcol. Sur. Cal. Paleont., vol. 1, p. 169, pi. 32,<br />

fig. 282. Phila., 1864. W. M. Gabb.<br />

Formation: Cretaceous.<br />

Location: Alizos creek, near Fort Tejon, Cal.<br />

- hilgardi n. s. Shumard. (1859.)<br />

Trans. Acad. Sci., St. Louis, vol. 1, 1856-1860, p.<br />

601. St. Louis, 1856-1860. B. F. Shumurd.<br />

Formation: Cretaceous.<br />

Location: Bluffs of Red river, Latnar, and Fannin<br />

counties, Tex.<br />

hilgardi (Shum.) Gabb. (1869.)<br />

Geol. Sur. Cal. Paleont., vol. 2, pp. 265, 266, pi. 36,<br />

fig. 13. Phila., 1869. W. M. Gabb.<br />

Formation: Cretaceous.<br />

Location: Sierra do las Conchas, near Arivechi,<br />

Sonora, Mexico.<br />

hilgardi (Shumard) White. (1883.)<br />

Twelfth Ann. Bep. U. 8. Geol. aud Geogr. Sur.<br />

Terr., pt. 1, p. 22, pi. 16, figs. 3

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