37 MOI.LUSCA OF THE GULF OF MEXICO 



Distribution and range. — T3-pical from North Carolina to Flor- 

 ida, 2-IO0 fathoms; variety, triinadus Dall, northern, from 

 Long Island to Nova Scotia. Miocene to Recent. 



Gulf Coast. — Cedar Keys, Florida. 



segeensis Jeffreys, Proc. Zool. Soc, p. 581, 1879. 



csgeensis Dall, Bull. Mus. Comp. Zool. Harvard Coll., vol. 



12, p. 246, 1886; Bull. 37, U. S. Nat. Mus., p. 42, 1889. 



Distribution and range. — Southward to Trinidad and in the 



Mediterranean Sea. 5 to 464 fathoms. Recent. 

 Gulf Coast. — Western Florida in shallow water (Dall). 



crenulata A. Adams, Proc. Zool. Soc, p. 52. i860. 



crenulata Dall, Bull. Mus. Comp. Zool. Harvard Coll., vol. 9, 

 p. 123, 1881 ; Ideyn, vol. 12, p. 247, 1886 ; Bull. 37, U. S. 

 Nat. Mus., p. 42, pi. 7, fig. 2, 1889. 

 culebrensis '$>xm.t\v. Challenger Rept. Lamell., p. 228, pi. 18, 

 figs. II, II a, 1885. 

 Distribution. — Hatteras to Barbados, 30 to 382 fathoms. 

 Gulf Coast. — Western Florida, 20 miles offshore (DallJ. 

 cymelia Dall, Bull. Mus. Comp. Zool., vol. 12, p. 247, 1886. 

 cytnella Dall, Bull. 37, U. S. Nat. Mus., p. 42. 1889. 

 Distribution. — Florida Straits to Yucatan. In deep water, 205 

 to 1 100 fathoms. Yucatan Strait, dredged in 540 fms. 

 (Dall). 



verrilli Dall 



trigona Verrill, Trans. Conn. Acad., vol. 6, p. 438, 1885. 

 verrilli Dall, Bull. Comp. Zool. Harvard Coll., vol. 12, p. 

 248, 1886; Bull. 37, U. S. Nat. Mus., p. 42, 1889. 

 Distribution. — Rhode Island to Yucatan. Recent. Abys.sal, 

 430 to 1605 fms. Gulf of Mexico. Texas region (Dall). 



chipolana Dall, Trans. Wagner In.st. Sci., vol. 3, pt. 4, ]). 575, pi. 

 32, fig. 10, 189S. 

 chipolana Aldrich, Manuscript Ala. well fossils. 

 Distribution. — Miocene of the Chipola River marls and lower 

 Alum Bluff bed, Florida ; Bascom No. i well. Mobile, Ala- 



