MOLLUSCA OF THE GULF OF MEXICO I30 



Distribution. — Tampa, West Fla., in shallow water, to 

 Jamaica. 



Genus CSRCULUS Jeffreys 



liratus Verrill, Tr. Conn. Acad. Sci., 5, p. 529, '82, {Omalaxis); 

 6, p. 452, '85, {Skenea)\ Bush. op. cil., 6, p. 464, '85; Bull. 

 M. C. Z., 23, p. 240, pi. I, II, 12, '93; Tr. Conn. Acad. 

 Sci., 10, p. 125, pi. 23, f. 7, i2-i2b, '99-1900. 



Adeorbis supranitidus var. orbignyi Dall, Bull. M. C. Z., iS, p. 

 278, '89; (in part); Tr. W. I. S., 3, p. 344, '92; Johnson, 

 Occ. Pa. Bost. Soc. N. H., 7, p. 120, 1915; Not orbignyi 

 Fischer, Journ. de Conch., 6, pp. 173, 286, '57. 



Distribution. — New England to Hatteras and West Florida. 

 Lower Miocene, Chipola beds, West Fla. 



Note. — The true Circidus orbignyiVi^&i rs, West Indian and 

 ver}" minute, onl}^ i)^ mm. in diameter, while liratus \s 2]/^ 

 mm. in diameter. 



trilix Bu.sh, Rept. U. S. Fish Com., for 1883, p. 584, 1885, (as 

 Skenea); Tr. Conn. Acad. Sci., 10, p. 127, pi. 22, f. 6, 10, 

 loa, 12, a-g, pi. 23, f. 10, 15, 1899-1900. 



Adeorbis supranitidus Dall, Bull. M. C. Z., 18, p. 278, '89; 

 Bull. 37, U. S. N. M., p. 150, pi. 41, f. 7, 7a, '89, (in 

 part), ^ot supranitidus Wood, Cat. 1842, Crag. Moll., p. 

 I37> pl- 15, f- 5a-b, 1848. 



Distribution. — Massachussetts to Hatteras and to Cedar 

 Ke5's, West Fla. 15-25 fms. Pleistocene, Knapp's No. 2 

 well, Terrebonne Parish, La., at 15 19-1632 feet. 



Genus LISSOSPIRA Bush 



proxima Tryon, Manual Conch., lo, p. 98, pi. z:;^, f. 4, 1888, 

 {Cydostrema) ; Bush, Tr. Conn. Acad. Sci., 10, p. 130, f. 4, 

 pi 22, f. 3, 1899-1900. 



rugidosum Y^rriW, Tr. Conn. Acad. ,5, p. 533,'82,(Qr/(?.s-/;r;««). 

 Not of G. O. Sars, 1878. 



