I08 MOLIvUSCA OP THE GULF OF MEXICO 78 



Distribution. — Massachussetts to Barbados and West Fla. 



(Syrnola) thelma Ball, Pr. U. S.N. M., 46, p. 254, pi. 20, f. 3, 

 1914. 



Distribution. — Upper Miocene or Pliocene. Well near Al- 

 exandria, La., at 49 feet. 



Genus TIIRBONJLLA Risso 



exilis C. B. Adams, Contr. to Conch., p. 74, 1850, (as Chemnit- 

 zia); Dall, Bull. 37, U. S. N. M., p. 128, '89; Tr. W. I. S., 

 3, p. 256, '92. 



Distribution. — Hatteras to Haiti and West Florida, 3-63 fms. 

 Pliocene of Caloosahatchie and Shell Creek, Fla. 



beloiheca Dall, Bull. M. C. Z., 18, p. 335, pi. 26, f. 7d, '89; Bull. 

 37, U. S. N. M., p. 128, pi. 26, f. 7d, '89. 



Distribution. — Gulf of Mexico, Blake station 32, at 95 fms., 

 west of Florida, 50 fms. Also Barbados, 100 fms. 



Interrupta Totten, Am. Jour. Sci., (i), 28, p. 352, f. 7, 1855, (as 

 Ttirritella); Dall, Bull. 37, U. S. N. M., p. 128, pi. 26, f. 

 2, 2b, 1889; 1*r. W. I. S., 3, p. 259, '92; Bartsch, Pr. Bost. 

 Soc. N. H., 34, p. 87, pi. 12, f. 1 8, 23, 1909; Johnson, Occ. 

 Pa. Bost. Soc. N. H., 7, p. 95, 1915. 



viridaria Dall, Pr. U. S. N. M., 6, p. 332, 1883. 



Distribution. — Nova Scotia to Barbados. 2-107 f^^-''- Gulf 

 coast: Cedar Keys, Fla. ; Galveston and Corpus Christi, Tex. 

 Pleistocene, L,ake Borgne borings. Da., Knapp's wells, Ter- 

 rebonne Parish, No. 2 at 1050-1790; No. 3 at 1 150-1839 feet, 

 also of North Creek, West Fla. Pliocene of the Caloosahat- 

 chie beds. 



textilis Kurtz, Cat. Rec. Mar. Shells, N. and S. Car , p. 8, '60, 

 (as Cheninitzia)\ Dall, Tr. W. I. S. 3, p. 257, 1892. 

 Distribution. — Charleston, S. C, to Marco, West Fla. 

 Pliocene, Caloosahatchie beds. 



