20 VIVIPARA. 
red, while in the latter they are green. Halde- 
man has correctly figured the species, but 
some of Mr. Binney’s figures have either been 
drawn by oversight from the Kuropean V. 
vivipara, or else the artist has neglected to 
represent the fourth (lowest) band. 
Prof. Haldeman’s supposition that all the 
Vivipare are viviparous is no doubt correct,— 
‘at least a large number of species are known 
to be so. 
5. VIVIPARA WALTONII, Tryon. 
Hald., t. vii, f. 3, 4, sub-nom. P. Bengalensis, 
Plate 13, fig. 2. 
Ovate-conic, moderately thick, spire mode- 
rately elevated, whorls 5—6, somewhat flat- 
tened above, more convex beneath ; aperture 
small, oval, the lip scarcely covering the small 
perforation. Epidermis polished, light olive, 
with four dark revolving bands, within bluish, 
exhibiting the bands. 
Length 22, diam. 17 mill. 
[46] 
