SEGMENTINA. 213 



Genus SEGMENTINA, Fleming. 



1. SEGMENTINA ARMIGERA, Say. 



Hald., Monog. p. 30, t. 4, f. 11—13. 



2. SEGMENTINA WHEATLEYI, Lea. 



Plate 7, fig. 17, 18, 19. 



Shell small, dark horn-colored, flat, obso- 

 letely striated, bicarinate, depressed above, 

 broadly and deeply umbilicated below ; whorls 

 five, obtusely carinated above, below acutely 

 so ; aperture white, thick, strongly constricted ; 

 within are six teeth. 



Alabama and Florida. 



Extra-limital. 



SEGMENTINA BERENDTII, Tnjon, 



(American Journal of Conchology, ii, 10, t. 2, f. 14 — 16.) 



Inhabits Orizaba and Vera Cruz, Mexico. 



(60) 



