1915.] H.B. Preston: Mollusca from Lake Chilka. 309 
Family LYONSIIDAE. 
Lyonsia samalinsulae, Preston. 
Rec. Ind. Mus., X, p. 310. 
Main channel W. of Satpara Id., 3-8 {t.; Serua Nadi, 5-9 ft. ; 
Mahosa, southwards towards sandhills, 4-8 ft. 
Family ANATINIDAE. 
Anatina barkudaensis, sp. n. 
(Figs. 25, 25a.) 
Shell rather small, oblong, gaping at both ends, but especially 
posteriorly, concentrically striate and minutely pustulate except 
at the posterior side, where the pustules cease abruptly and the 
shell is only very coarsely and irregularly concentrically striate ; 
24, 
Fics. 24, 24a.—Anatina barkulensis, sp.n. X 3. 
4» 25, 25a.—Anatina barkudaensis, sp. n. X 3. 
umbones of moderate size, slightly prominent; dorsal and ventral 
margins nearly straight; anterior side rounded; posterior side 
very abruptly rounded; hinge quite normal. 
Long. 9°25, lat. 17 mm. 
Hab.—Barkuda Id. (Tye); Chiriya Id.; Manikpatna Id.; in 
mud at edge of Lake Rambha, Ganjam District, Madras; swamp 
inside bar, N. of Barhampur Id. ; Satpara Bay; channel between 
Satpara and Barnikuda, 6-10 ft.; E. side of Rambha Bay, 1-4? ft. 
Anatina barkulensis, sp. n. 
(Figs. 24, 24a.) 
Shell oblong ovate, thin, gaping at both sides, white, 
minutely pustulous, the margins showing traces of a reddish lami- 
niferous periostracum, concentrically striate; umbones rather 
large, moderately prominent; anterior margin somewhat straight ; 
