18G7.] Contributions to Indian Malacology. 55 



Family SCALARIADiE (Scalidce, H. and A. Adams.) 

 No. 4, Scalaria, sp. 



A minute species, apparently new. As I possess but a solitary 

 specimen, which is not in the best possible order, I hesitate to de- 

 scribe it. It is one of the smallest forms known, measuring only 3 

 millimetres in length. It was found under stones in the Myittaya 

 creek. % 



Family CERITHIIDyE. 



No. 5, Cerithium (Vertagus) obeliscus, Born. 



A single specimen was found at Port Dalhousie. 

 No. 6, Potamides (Tympanotonos) alatus, Phil. 

 No. 7, Potamides (Tympanotonos) enriptera, A. Ad. 



Both this and the last species are met with abundantly on mud 

 between tide marks, not far from the sea. They also occur on the sea 

 coast where it is muddy. 

 No. 8, Potamides (Telescopium) fuscus, Chemn. 



Common on mud between tidemarks, where the water is completely 

 salt. 



Besides the above, a species of Cerithidea has been found by Mr. 

 Theobald in the estuaries of Burma. I did not meet with it. 



Family LITTORINID^E. 

 No. 9, Littorina melanostoma, Gray. 



Very abundant upon " mangrove" trees, close to high water mark. 

 No. 10, L. scabra, L. 



Occurs with the last, which appears to pass into it. Two varieties 

 of this form occur, one more coarsely sculptured and more stoutly 

 keeled than the other. 

 No. 11, L. zic-zac, Chemn. 



Syn. L. undid 'at a, Gray. 



This species is frequently found on the sea coast, especially near 

 mouths of rivers. In the estuary of the Bassein river, it occurs to- 

 gether with true estuarine forms. It is met with on stones and dead 

 wood, close to high water mark. 



Family ASSIMINIID^. 

 No 12, Assiminia rubella, W. Blanf. pi. II. fig. 11. 12. 



A small roundly ovate, dull red species, which occurs abundantly 



