318 Notes on some Indian Freshwater Shells. [No. 4, 



5. C.Zehrinus,B. — Nanclai Poonji on the northern water-shed of 

 the Khasia hills, 92° 30' east; 25° 15' north. It is by no means 

 an abundant species. 



6.* C. Tomotrema, E. Teria ghat, rare. This shell is of the same 

 type as the Birmese C. scissimargo. 



7.* C. JPinnulifer, B. — Teria ghat. Not rare, varies from 0.60 to 

 0.30. 



Leptopoma, Per. 

 8.* L. Cyleus, B. — Teria ghat, rare. Nanclai, rare. A thin 

 shell of arboreal habits. 



Ali/cceus, Gray. 

 9.* A. JProsectus, B. — Teria ghat ; very common on rocks. 

 10.* A. Heftes, B. — Teria ghat, not rare. 



Diplommatina, Bekson. 

 11.* D. Polypleuris, B. — Nanclai. Not rare on rocks. 

 12.* D. Diplocheilus, B. — Teria ghat. A short species common 

 on rocks. 



JPupina, Vignard. 



13. JP. Imlricifera. B. — Teria ghat, rare. Pound on rocks an 

 decayed trees, but mostly on the latter. The operculum exhibits 

 the spiral structure observable in Cataulus. 



Hydrocena, Parrtess. 



14. JET. Sarrita, B. — Teria ghat. Cherra, Nanclai, common on 

 rocks and amongst moss on trees. 



Helicid^. 

 Helix, L. 



15. H. Plectostoma, B. — Teria ghat, very common, a large variety 

 is found on limestone rocks, a smaller one on trees, juvenile shells 

 of this species are remarkably hirsute. 



16. H. Serrula, B. — Teria ghat. Common. A beautiful diaphan- 

 ous species with sharply chisselled striae causing a toothed periphery. 

 B-eeve's figure conveys a poor idea of the shell. 



17. jET. Delihrata, B. — Teria ghat. Very rare. This shell extends 

 to Birmah and when fine has a hirsute epidermis. 



18. H. Tapeina, B. — Teria ghat and along the foot of the hills. 

 This shell chiefly affects Areca palm trees. It is very closely allied 

 to the Birmese II. rotatoria. 



