21G On new S/tells from Lower Beu^jaJ. 



from the uinboes, sculpturecl with fine concentric lines ot 

 growth; umboes small, nearly central. 



Alt. 3-2'), leni;th T) mm. 



llah. Port Canning, Lower Bengal ; in brackish pools. 



Type in Indian Museum, Calcutta. 



Corhula calcaria, sp. n. (Fig. '>.) 



Shell elongatelj oval, depressed, thin, chalky white, poste- 

 rioily sharply rounded, anteriorly truncate; umboes small. 

 Alt. '?>, length 5 mm. 



Huh. Port Canning, Lower Bengal; in brackish pools. 

 Type in Indian Museum, Calcutta. 



Corhula gracilis , sp. n. (Fig. 4.) 



Sliell oblong-ovate, thin, whitish, rather ventricose, obso- 

 letely concentrically ribbed, posteriorly rounded, anteriorly 

 elongately produced, truncate ; umboes small, situated some- 

 M hat posteriorly. 



Alt. 4, length G mm. 



Ilah. Port Canning, Lower Bengal; in brackish pools. 



Type in Indian Museum, Calcutta. 



Corhula Pfefferi, sp. n. (Fig. 5.) 



Shell ovate, somewhat triangular, moderately ventricose, 

 thin, white, posteriorly obliquely rounded, anteriorly bluntly 

 beaked, sculptured with rather coarse, smooth, concentric ribs 

 and very line transverse strise or scratches, these last being 

 especially noticeable on the right valve; umboes small, 

 central. 



Alt. 3"5, length 5 mm. 



Ilah. Port Canning, Lower Bengal ; in brackish pools. 



Type in Indian Museum, Calcutta. 



Bithinella canningensisj sp. n. (Fig. 6.) 



Shell subperforate, pyramidal, dull yellowish-brown horn- 

 colour ; remaining whorls 8, somewhat conve.x ; sutures well 

 impressed; aperture oval; peristome simple, continuous; 

 operculum horny, paucispiral. 



Alt. 1*75, diam. nifij. 1 mm. 



Hah. Port Canning, Lower Bengal; in brackish pools. 



Type in Indian Museum, Calcutta. 



