1915.) H. B. PrEstoN: Mollusca from Lake Chilka. 303 
Diplodonta (Felania) annandalei, Preston. 
hee. Ind. Mus., X, p.. 307. 
Channel between Satpara and Barhampur Id., 6-8 ft.; outer 
bar close to mouth; main channel W. of Satpara Id., 3-8 ft.; 
channel off Barhampur Id., 6-9 ft.; 3-4 miles KE. by S. 4 S. of 
Patsahanipur, 5-54 ft ; 4-9 miles E. by S. 4 S. of Patsahanipur. 
4-5 ft.; near Barnikuda, inside lake, 54 ft.; Satpara Bay; outer 
bar opposite Manikpatna temple; Maludaikuda Id.; 2-8 miles 
N.E. 4 E. of Kalidai, 5-6 ft. 
Diplodonta (Felania) chilkaénsis, Preston. 
Tee. p 307. 
Manikpatna Id., sand-dunes opposite Manikpatna; outer bar 
I mile S.W. of mouth, 6 ft.; swamp inside bar N. of Barhampur 
Id.; outer bar opposite Manikpatna temple; S. side of Satpara 
Id., opposite bungalow. 
Diplodonta (Felania) ovalis, Preston. 
T.c., pp. 308-309. 
Outer bar, 1 mile S.W. of mouth, 6 ft.; channel between 
Satpara and Barhampur Id., 6-8 ft. 
Family DONACIDAE. 
Donax pulchella Hanley. 
Proc. Zool. Soc. London, 1843, p. 6. 
Outer bar close to mouth (a single valve). 
Family PSAMMOBIIDAE. 
Psammobia mahosaénsis, sp. n. 
(Figs. 16, 16a-b, p. 304.) 
Shell small, very inequilateral, ovately cuneiform, concentri- 
cally striate, whitish, covered with a thin brown periostracum 
which is chiefly noticeable round the margins, both valves angled 
posteriorly; umbones small; dorsal margin angularly arched; 
ventral margin gently rounded; anterior side rounded; posterior 
side rather abruptly descending ; right valve furnished with two 
minute cardinal teeth, the anterior being placed at a very obtuse 
angle to the posterior; the left valve also bearing two minute 
cardinals of which the anterior fits between those of the right valve. 
Long. 6°25, lat. 9°25 mm. 
Hab.—Southwards from Mahosa, 5-9 ft. (Type); channel 
between Satpara and Barhampur, 8-20 ft.; channel between Bar- 
nikuda and Satpara, 6} ft.; on swamp inside bar N. of Barham- 
pur Id.; Mahosa, southwards towards sandhills, 4-8 ft. 
