66 



MOI.LUSCA OF THE GULF OF MEXICO 



36 



thea Ball, Pr. U. S. N. M., 6, p. 328, pi. 10, f. 5, 1883; Bull, M. 

 C. Z., 18, p. 91, '89; Bull. 37, U. S. N. M., p. 98, pi. 48, 

 f. I, '89« 



Distribution.— Hatteras to Florida Keys, and West Florida 

 at Cedar Keys, 3-15 fms. 



Note. — The variety Dall (Bull. M. C. Z., 18, p. 



91, 1889) was dredged in Gulf of Mexico, U. S. Fish Com. 

 Station 2402 at 1 1 1 fms. 



Simpsons Dall, Pr. Davenport Acad. Sci., 5, p. 54, 1887, (as 

 Pleiirotomd) \ Bull. M. C. Z., f8, p. 91, 1889. 



Distribution. — Hatteras to Tampa Bay, West Florida, 15- 

 18 fms. 



lissotropis Dall, Bull. M. C. Z., 9, p. 58, Ang. 1881; 18, p. 91, 

 pi. II, f. 3, 4, 1889; Bull. 37, p. 98, pi. II, f. 3, 4, '89. 



hypseSa Watson, Jour. Linn, Soc, 15, p. 433, Oct. 1881; Chall. 

 Gastr., p. 341, pi. 21, f. 4, 1885. 



Distribution. — Gulf of Mexico, West of Florida at 220 fms. 

 Also Antillean. Variety perpolita Dall (Tr. W. Inst., 3, p. 



36, '90), Caloosahatchie Pliocene. 



dalli var. cesirota Dall, Bull. M. C. Z., 18, p. 92, 1889; Bull. 



37, p. 98, '89. 



Distribution. — Between the Mississippi delta and Cedar 

 Keys, at 196 fms. Typical dalli Verrill, ranges from 

 Martha's Vineyard to Delaware Bay. 



nucleata Dall, Bull. M. C. Z., 9, p. 62, '81; 18, p. 92, pi. 11, f. 



1, 1889. 



Distribution. — Gulf of Mexico, 229-339 fms. Also Antillean. 

 Pleuroloma aniblia Watson may be a synonj^m. 



verrilli Dall, Bull. M. C. Z., 9, p. 68, 1881: 18, p, 93, pL 11, f. 



2, 1889; Bull. 37, p. 98, pi. IT, f. 2, '89. 



Distribution. — Gulf of Mexico, West of Florida, 220-310 fms. 



