144 



a'. Shell globose. 



b'. Strongly or microscopically striate longitu- 

 dinally leata. 



munipurensis. 

 fragosus. 

 a' . Shell depressedly conoid. 



V. Smooth mahadeoensis. 



hengdanensis. 

 razamiensis. 

 lalwpaensis. 

 hookeri. 



c. Upper surface transversely plicate or ribbed .... plicifera. 



shisha. 



d. Shells not exceeding about 6 mm. fa quarter 



inch) in diameter. (Generic affinities often 

 doubtful.) 

 a. Subglobose or subturbinate. 



b. Smooth nengloensis. 



koliaensis. 



roberti. 



tanirensis. 

 b'. Longitudinally striatedl longicauda. 



dorani. 



originaria. 



umbraticola. 

 a'. Depressed or conoidly depressed. 



b" . Longitudinally striated sata. 



pacata. 



rusticula. 

 E. Species from Burma, Arakan, and Tenasserim. 



a. Peristome labiate consepta. 



a'. Smooth petasus. ' 



aspides. 



b. Peristome not labiate chaos. 



a". Longitudinally (spirally) striated kumahensis. 



causia. 

 b'. Subglobosely depressed. 



a'". Smooth sahvinensis. 



duffasti. 

 b". Depressed or conoidly depressed. 



b"'. Smooth subpetasus. 



noxia. 



& 4 . Longitudinally striated nebulosa. 



notha. 

 hypoleuca. - 

 spreta. 

 patens. 



c. Shells not exceeding 6 mm. 



a'. Turbinate pungi. 



b'. Depressed or conoidly depressed. 



a". Smooth molecula. 



curvilabris. 



b". Longitudinally striated perpaula. 



pauxillula. 



