MOLLUSCA OF THE GULF OF MEXICO 50 



yucatecasia Dall, Bull. M. C. Z., 9, p. 72, 1881; iS, p. 138, pi. 

 19, f. 5, '89; Bull. 37, U. S. N. M., p. 106, pi. 19, f. 5, 

 1889. 



Distribution. — Yucatan Strait, 640 fms. Also Sand Key, 

 Fla., 125 fms. 



seminula Dall, Bull. M. C. Z., 9, p. 72, 1881; 18, p. 139, pi. 19, 

 f. 2, '89; Bull. 37, U. S. N. M., p. 108, pi. 19, f. 2, '89. 



Distribution. — Yucatan Strait, 640 fms. Also Antillean. 



rostrata Redfield, Cat. Marg., Am. Jour. Conch., 6, p. 246, 

 (note), 1870; Dall, Bull. M. C. Z., 18, p. 137, '89; Tr. W. I. 

 S., 3, p. 50, 1890. 



oblonga Sowerby, Thesaurus, pi. 76, f. 106, 108. ^o]^ 

 oblo7iga of Swainson. 



Distribution. — Gulf of Mexico, Lat. 23° N., Lon. 89° W. , 

 in 84 fms. Pliocene, Caloosahatchie beds. 



(Volvarina) avena Valenciennes, in Kiener, Coq. Yiv.Marginella, 

 p. 17, pi. 6, f. 24, 1841; Sowerby, Thes. Conch., i, p. 391, 

 pi. 76, f. 130, '49; Dall, Bull. 37, U. S. N. M., p. 108, '89; 

 Dall & Simpson, Bull. U. S. Fish Com., i, p. 394, 1901; 

 Vaughan, Publ. No. 133, Carn. Inst., p. 171, 1910. 



Distribution. — Key West to Colon. Also Texas region, 

 Gulf of Mexico. Pliocene to Recent. Pleistocene, Isa- 

 bella, West Fla. 



(VoSutella) ovufiformis d'Orbigny, Moll. Cuba. 2, p. loi, pi. 20, 

 f. 33-35, 1845; Dall, Bull 37, U. S. N. M., p. 108, '89; 

 Dall & Simpson, Bull. U. S. Fish Com., i, p. 395, 1901; 

 Vaughan, 2nd Ann. Rept. Fla. G. S., p. 148, 1910. 



Distribution. — Cape Fear, N. C, to Guadeloupe Isl. Also 

 West Florida. Pleistocene, Manatee, West Fla. 



(Volyfella) hadria Dall, Bull. M. C. Z., 18, p. 142, 1889; Bull. 37, 

 U. S. N. M., p. 108, '89. 



