42 Records of the Indian Museum. [Voi,. VI, 1911.] 



somewhat crooked; ventral margin not excavated, also rather 

 crooked ; anterior side acuminateh^ rounded ; posterior side sloping 

 above, rounded below. 



Long. . . . . • • 7*5 nim, 



Lat. . . . . . . 17-5 ,, 



Hah. — Rambha, S. end of Lake Chilka (Dr. N. Annandale) : 

 found on stones between tide marks. Type in Indian Museum, 

 Calcutta. (M. ^V'-) 



