1921.] N. Annandale & B. Pkashad : Indian Molluscs. 129 



ending in an obtuse apex, the boss being well developed, and by 

 the mouth lieing nearly round. 



Stenothyra blanfordiana, Nevill. 



1880. Stenothyra blanfordiana, Nevill, op. cit., p. 160. 

 1S81. Stenothyra blanfordiana, Nevill, op. cit , p. 15O, pi. vii, tij^'. ki. 

 18S5. Stenothyra blanfordiana, Nev'ill, op. cit., p. 45. 

 19117. Bithtnella canningensn, Preslon, Ann. Mag. Nat. Hist., scr. y. 

 .\IX. p. 2i(), tig. 6. 



1914. Stenothyra chilkaensis and i'. oriisaensis (in part nol iho rti^.l, 



Preslon, Rec. hid. Mns. X, p 300, tig. 1. 

 11)15. Stenothyra blanfordiana, S. ckilkai:nsis, S. orissai'iisls and 5'. 

 minima (in part), Preston, op. cit., pp 81, 82. 



1915. Stenothyra obesiila, Preston, Rec. hid. Miis. XI. pp. 292, 29,"5, 



,%• 4- . . 



1916. Stenothyra blanfordiana, S. minima an 1 S. orissai'nsis {in part), 



S. chilkaensis and i'. obesiila. .\nnandale and Kemp, Mem. 

 hid. Mas. V, p. 346. 



Nevill "s description of the species is very concise and accurate, 

 and the figure of the species published in his second paper, cited 

 above, is a very good representation of the species. It is unfor- 

 tunate, therefore, that Preston should have described specimens 

 of this species from the type-locality — the Chilka I/ake, under 

 the new names 5. chilkaensis and S. obesula. The latter was 

 based by him on a single specimen only. We have carefully com- 

 pared Preston's types of his new species with Nevill's type of S. 

 blanfordiana and many other specimens of the species in the In- 

 dian Museum, and can detect no constant differences. Preston 

 further identified specimens of this species as S. minima and 

 6 orissaensis ; the latter of which names is no more than a 

 synonym of 5. minima. As to Bithinclla canningcnsis, we found 

 on examination of the type-shell that it was a young shell of 5. 

 blanfordiana ; as is one of the co-types. The rest of the series 

 identified by Preston as B. caniiingcnsis consists of shells of the 

 forma typica and var. snbanoiila'a of 5. {Astcnothvra) imliacca. 



We have nothing to add to Nevill's original description 

 beyond noting the near relationship of this species to 5. minima 

 (Sowerby), which also occurs in the Chilka I^ake. The two are so 

 closely allied that one is liable to mistake specimens of the one for 

 those of the other, unless the shells are carefully examined under 

 a fairly strong lens from both the dorsal and ventral sides. When 

 so examined the regularly increasing whorls of the spire of S. 

 nnnima at once mark it of from 5. blanfordiana. 



S. blanfordiana is known from the Chilka Lake, Madras, and 

 Port Canning in the Gangetic Delta. 



The tj'pes of S. blanfordiana, S. obesula and S. chilkaensis are 

 all preserved in the collections of the Zoological Survey of India 

 (Indian Museum). 



Stenothyra minima (Sowerby). 



1837. ^ieinatiira minima, Sowerby, Charleswortii's Mag. 1, p. 217, fig. 



22 b, b. 

 iS;!. Stenothyra minima, .\dams, Proc. Zool. Soc. London, p. 225 



