160 MOTXUSCA OF THE GULP OF MEXICO 130 



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

 Jamaica. 



Genus C5RCULUS Jeffreys 



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

 6, p. 452, '85, (Skenea); Bush. op. cit., 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,, 18, 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, 2S6, '57. 



Distribution. — New England to Hatteras and West Florida. 

 IvOwer Miocene, Chipola beds, West Fla. 



Note. — The true Circulus orbignyi Fisher is West Indian and 

 very minute, only ij^ mm. in diameter, while liratus is 2^ 

 mm. in diameter. 



iriSix Bush, 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 supraiiitidus 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). Not supranitidics Wood, Cat. 1842, Crag. Moll., p. 

 137, pi. 15, f. 5a-b, 1848. 



Distribution.— Massachussetts to Hatteras and to Cedar 

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

 well, Terrebonne Parish, La., at 1519-1632 feet. 



Genus LISSOSPSRA Bush 



proxima Tryon, Manual Conch., 10, p. 98, pi. 33, f. 4, 1888, 

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

 pi 22, f. 3, 1899-1900. 



ricgulosum 'SferriW, Tr. Conn. Acad. ,5, p. 533,'82,(Q/^/^.f/rd'/«<2). 

 Not of G. O. Sars, 1878. 



