VIVIPARA. 81 
Length 35, diam. 22 mill. 
Alabama. 
Mr. Binney remarks that (Monog., p. 115) 
“ All but the one drawn in Fig. 227 (my fig. 
1) could not be distinguished from Melania 
without the presence of the operculum, thus 
furnishing another example of the impossibility 
of ascertaining from the shell alone the gene- 
ric position of some species.” I examined the 
specimens, and could not see any resemblance 
to Melania. I think their appearance deci- 
dedly, Viviparish. 
20. VIVIPARA LIMA, Anthony. 
Plate 13, figs. 8, 9, 10. 
Shell ovate, rather thin, dark green, whorls 
6, flattened, angulate at the middle and bear- 
ing coarse irregular, distant, revolving striz 
and angles, sutures distinctly impressed, aper- 
ture narrow, nearly half the entire length of 
the shell, umbilicus generally covered. Light 
olive colored, bluish within. 
(57) 
