80 STREPTAXIS. 



S. PERSONATUS, Blanford. PI. 16, figs. 83-85. 



Umbilicated, smooth, shining, translucent, pale yellowish 

 white, suture impressed ; whorls 5, the last convex below and 

 compressed around the umbilicus, scrobiculated behind the 

 mouth ; aperture with a parietal lamina, and five lip teeth of 

 which three are on the columellar and two on the right margin ; 

 peristome thickened, almost continuous, the parietal callus being 

 raised. Diam., 5 mill. 



Madura, India. 



The teeth vary, being sometimes smaller, or the upper colu- 

 mellar tooth wanting ; in one case the upper tooth of the right 

 margin is also deficient. 



S. COMPRESSUS, Blanford. PL 16, figs. 96, 97, 100. 



Rather openly but not perviously umbilicated, scarcely 

 striated, translucent, glossy, yellowish white, suture but little 

 impressed ; whorls 4J, penultimate bluntly keeled posteriorly, 

 the last flattened and smooth below, compressed around the 

 umbilicus, scrobiculate behind the mouth; aperture with five 

 teeth, of which four are in the lip, and a re-entering bifid plait 

 on the parietal callus ; peristome thickened and expanded, 

 sinuate above. Diam., 6 mill. 



Tinnevelly, India. 



A variety has distinct but very fine close filiform raised lines 

 on the upper surface and inside the umbilicus, and the parietal 

 lamina is double. 



S. MOUHOTI, Pfeiffer. PL 15, fig. 46. 



Perviously umbilicated, thinnish, closely oblique ribbed- 

 striate, whitish, suture impressed, submarginate ; whorls 6-J-, the 

 last becoming smooth and flattened below ; aperture with an 

 entering parietal lamina and three minute lip teeth ; peristome 

 white, narrowly reflected, slightly arcuated above. 



Diam., 13 mill. 



Siam. 

 S. BULBULUS, Morelet. PL 15, figs. 41-43. 



Openly perforate, solid, arcuately costulate, somewhat shining, 

 white ; whorls 6 J, the last compressed and angulated around the 

 umbilicus ; aperture with a strong parietal lamina and sometimes 



