248 



Records of the Indian Museum. 



[Vol. XVI. 



and swollen and the body-whorl relativel}^ short and stout, not at 



all flattened on the ventral surface. 



Text-fig. 3. — Stenotlivra sohita, sp. nov. 



view of the shell-whorls as seen from 



above. 



The suture is barely impressed. 

 There are three and a half 

 whorls. The aperture is 

 large, oval, rounded poste- 

 riorly, very prominent, and 

 with the peristome thick 

 and somewhat plicated con- 

 centrically. There is no um- 

 bilicus. The periostracum 

 is olive-green, opaque ; the 

 surface is smooth, but not 

 highly polished ; minute 

 longitudinal striae and still 

 more minute transverse 

 striae are present, but punc- 

 tured lines are entirely 

 absent. 



Measuretnents of type-shell {in millimetres). 



Length . . . . . . . . 4* i 



Breadth of body-whorl , . . . 2*8 



Length of spire (dorsal view) . . . . 1*5 



Breadth of spire (dorsal view) . . . . 24 



Length of aperture . . . . . . 2'0 



Breadth of aperture . . . . . . i*6 



Type-specimen: M '-2'-- in the collection of the Zoological 

 Survey of India. 



Locality. — A single specimen was found in flood refuse at the 

 edge of a creek in the Gangetic Delta at Basanti, July 20th, 1918. 



The species is distinguished by the looseness of its spire, its 

 swollen whorls, the flattened apex, and the absence of punctured 

 spiral lines ; the peristome is well developed. Although the shell 

 has a somewhat abnormal appearance, we know of no species to 

 which it could be assigned as an aberration. 



Genus Bithinclla, Moquin-Tandon. 



So far as we have been able to discover, only one species of 

 this genus has as yet been found in India. This species is con- 

 fined to brackish water of considerable but variable salinity. 



Bithinella miliacea (Nevill). 



1880. Hvdi'ohia {Belgrandia) miliacea, Nevill, Joiini. As. Soc. Bengal, 



XLIX, p. 161, pi. viii, fig. 7. 

 1884. Hydrohia {Bythinella) miliacea, Nevill, Iland-ltst Moll. Ind. 



Mils., II, p. 52. , ' • \ VI Y 



1907. Bitliiiiella cannin^ensis, Preston, Ann. Mag. Nat. Hist. (7) AlA, 



p. 216 ( fig. in text ). 



