37 Bulletin 38 67 



havanensis Dall, Bull. M. C, Z., 9, p. 67, 1881; 18, p. 93, pi. 11, 



f. 5, '89. 



Distribution. — Yucatan Strait, 640 fms. Also off Havana. 



iithocoHeta Watson, Jour. Linn. Soc, 15, p. 441, 1881; ClialL 

 Rept. Gastr., p. 320, pi. 24, f. 6, 1S85 {?iS Pie uro to ma); 

 Dall, Bull. M. C. Z., i3, p. 95, pi. 11, f. 6, '89; Bull. 37, p. 

 98, pi. II, f. 6, '89. 



Distribution. — Hatteras to Guadeloupe, W. I. Also Gulf of 

 Mexico between Mississippi delta and Cedar Keys, at 940 

 fms. 



Genus CY^'SATOSYRINX Dall 



centimata Dall, Bull. M. C. Z., 18, p. 95, pi. 36, f. 9, 1889; Bull. 

 37, U. S. N. M., p. 98, pi. 36, f. 9, '89. 



Distribution. — Hatteras and Gulf of Mexico, Lat. 24° N., 

 lyon. 84° W. at 1920 fms., and between Mississippi and 

 Cedar Keys at 118 1 fms. 



moseri Dall, Bull. M. C. Z., 18, p. 97, pi. 36, f. 3, 1889; Bull. 

 37, U.S. N. M., p. 98. pi. 36, f. 3, '89. 



Distribution. — Cape Hatteras and Sarasota BajT-, West Fla. 



Genus PLEUROTOiVIELLA Verrill 



Packard 1 Verrill, Am. Jour. Sci., (3) 5, p. 15, 1873; Tr. Conn., 

 Acad., 5, p. 453, pi. 43, f. 9, pi. 57, f. 5, '82. 



Distribution. — Gulf of Maine to Rhode Island. The variety 

 benedicHY. &S., (Dall, Bull. 37, U. S. N. M.,p. 102, pi. 

 14, f. 4, pi. 60, f. 70 a, '89) ranges from Gulf of Maine to 

 Bequia, 1 290-1507 fms. Gulf of Mexico, West Florida region. 



leucomata Dall, Bull. M. C Z., 9, p. 63, 1881, (a.s Drillia);id,, 

 p. 120, pi. II, f. 13, '89; Bull. 37, p. 102, pi. II, f. 13, 

 1889. 



