138 Mollusc A of the Gulf op Mexico 108 



Genus A LAS A A. Adams 



iervaricosa C. B. Adams, Pr. Bost. Soc, N. H., 2, p. 6, 1845, 

 {as J^issoa); Moerch, Malak, Blatt., 23, p. 57, 1876; Dall, 

 Bull. U. S. N. M., p. 146, '89; Dall and Simpson, Bull. U. 

 S. Fish Com., i, p. 431, 1901. 



Distribution. — Tampa, West Fla., to Haiti. 



Genus ARCHITECTON ICA Bolten 



granulata Lamarck, Anim. s. Vert., 7, p. 3, 1822; Enc\-. Me'th., 

 pi. 446, f. 5a-b, 1792, (as So/afium); Dall, Tr. W.I.S., 3, p. 

 329, 1892; Pr. U. S. N. M., 37, p. 232, 1910; Maury, Bull. 

 Araer. Pal., No. 29, p. 131, pi. 23, f. 3, 1917. 



perspeciiva Tuomey and Holmes, PI. Foss. S. Car., p. 120, pi. 

 26, 1857. Not of Linnaeus nor Lamarck. 



Distribution. — Hatteras to the Antilles. Gulf coast at 

 Chandeleurs, La., Matagorda and other localities, Tex. 

 Also Pacific Ocean, Lower California to Peru. Pleistocene, 

 New Orleans pumping station No. 7; Upper Miocene, Gal- 

 veston well at 2 1 58-287 1 feet. Lower Miocene, Chipola 

 marl. West Fla., and Dominican Republic. 



Genus TOR I fJ 8 A Gray 



cyiindrica Gmelin, S3'st. Nat., p. 3572, 1792, (as TrocJms); Tryon, 

 Man., 9. p. 17, pi. 5, f. 82, 1887; Dall, Bull. 37, U. S. N. 

 M., p. 148, '89; Dall and Sampson, Bull. U. S. Fish Com., 

 I, p. 432,1901. 



Distribution.— Texas to St. Thomas, W. I. 



canalifera C. B. Adams. Dall, Bull. 37, U. S. N. M., p. 148, 

 1889. 



Distribution. — Texas to Guadeloupe. 



Genus RISSOA Fre'minville 



precipitata Dall, Bull. M. C. Z., 18, p. 279, pi. 19, f. i, 1889; 

 Bull. 37, U. S. N. M., p. 148, pi. 19, f. I, '89. 



