32 VI1VIPARA. 
Length 31, diam. 19 mill. 
South Carolina. 
This is a very distinct species, and can 
scarcely be confounded with any other. Its 
conical form, flattened whorls, and revolving 
angles, as well as its peculiar color, are its 
most prominent characters. There is a re- 
markable uniformity of appearance in the spe- 
cimens that I have examined. 
21. VIVIPARA COARCTATA, Lea. 
Plate 15, fig. 1. 
Plate 18, fig. 7 ( Vivipara ewilis, Anth.) 
Shell ovate, moderately thick, whorls 7, 
convex, sutures well impressed, spire elevated, 
narrow, pperture narrowly ovate, small, the 
lip-extremities connected by a deposit on the 
columella which nearly covers the umbilicus. 
Surface marked by slight growth-lines, the 
periphery sometimes very slightly angulated. 
Length 30, diam. 18 mill. 
Mississippi, eae Alabama ? 
