30 ; VIVIPARA. 
thickened above. Green, white or bluish 
’ within. 
Length 17, diam. 14 mill. 
Alabama, Tennessee. 
This shell does not appear to resemble 
closely any of the other species, although it 
might perhaps be a much eroded decisa. It is 
certainly not referable to the genus Lithasia, 
as Mr. W. G. Binney has supposed. The V. de- 
capitata, Anth., appears to be the same species. 
19. VIVIPARA DECAMPI, Currier. 
Plate 14, figs. 1, 2. * 
. 
Shell ovate-oblong, imperforate, thick, with 
coarse wrinkles and longitudinal striz, decus- 
sated by delicate revolving strie; spire 
elevated, truncated ; remaining whorls three, 
those of the spire somewhat flattened, the last 
more convex, with a scarcely perceptible me- 
dian angle. Aperture ovate, narrow. Green- 
ish olive, with dark broad bands when young, 
uniformly dark olive when old, bluish within. 
(56) 
