1908. 



Records of the Indian Museum. 



47 



Though the shell itself is of a brownish horn colour, all the 

 specimens before me are covered with a thick blackish coating 

 of some substance J probabl}" of a vegetable nature. 



lYpe in Indian Museum, Calcutta. 



Fir.. 4. 



Fig. 5. 



Fig. 4. — Odostomia pfeifferi, sp. nov. 

 Fig. 5. — Miralda otmina, sp. nov. 

 Fig. fi. — LimricFci siimtlaiis, so. nov. 



Fig. 6. 



Unto siligunejisis, sp, nov. 



vShell inequilateral, ovate oblong, reddish brown, sculptured with 

 concentric lines of growth and oblique transverse wrinkles, these 

 latter being especially marked posteriorly ; anterior side rounded ; 

 posterior side acuminateh' rounded ; dorsal margin arched ; ventral 

 margin very slightly contracted in the middle ; umboes much eroded ; 

 interior of shell iridescent, pale bluish white. 



Long. 



Lat. 



Habitat — vSiliguri, N. Bengal. 



Type in Indian Museum, Calcutta. 



21 mm. 

 3775 ,. 



Fig. 7. Fig. 8. 



Fig. 7. — Unio siliguriensis, Preston (type), sp. nov. 

 Fin, H.-^^Cnrbiciila sylhetica, Preston, .sp. nov. 



Corbicula sylhetica, s]). nov. 



Shell nearly equilateral, tumid, subtrigonal, pale olive-green, 

 sculptured with fine irregular concentric strise; anterior side rounded ; 



