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GEOLOGICAL SURVEY

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294 NORTH AMERICAN MESOZOIC INVERTEBRATA. [DULL. 102.<br />

Tunis Continued.<br />

(Drillia) varicostata u. 8. Gabb.<br />

(1864.)<br />

Geol. Sur. Cal. Paleont., vol. 1, p. 93, pi. 18, fig. 47.<br />

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

Formation: Cretaceous.<br />

Location: Near Clayton, Contra Costa county,<br />

Cal.<br />

(Surcula) ? contortus (M. & H.)<br />

Meek. (1876.)<br />

Hep. U. S. Geol. Sur. Terr.,vol.9,pp.385,386,pi.<br />

31, figs. 7n-c; fig. 49, p. 385. Wash., 1870. F.<br />

B. Meek. °<br />

Formation: Cretaceous.<br />

Location: Moreau river, Dak.<br />

(Surcula) ?hitzin. s. Meek. (1876.)<br />

Rep. U: S. Geol. Sur. Terr., vol. 9, pp. 380-388,<br />

fig. 50, p. 387. Wash., 1870. F.B. Me

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