SEGMENTINA. 213 
Genus SEGMENTINA, Fleming. 
1. SEGMENTINA ARMIGERA, Say. 
Hald., Monog. p. 80, 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, Tryon. 
(American Journal of Conchology, ii, 10, t. 2, f. 14—16.) 
Inhabits Orizaba and Vera Cruz, Mexico. 
(60) 
