1915.| H.B. Preston: Mollusca from Lake Chilka. 301 
Tapes ceylonensis, Sow 
Thes. Conch., I, p. 683, pl. cxlvi, figs. 24-25. 
Sand-dunes opposite Manikpatna (juvenile examples); chan- 
nel near Mirzapur, 8-12 ft.; Mahosa, Barhampur Id ; Serua Nadi, 
5-9 ft. (young specimens only). 
Clementia annandalei, Preston. 
Rec. Ind. Mus., X, p. 300. 
Serua Nadi, 5-9 ft. (young examples); Nalbano and channel 
S.E. of Nalbano, 4-8 ft (also young). 
i 
L By. 
SS 
—A Ww x ; 7 e Sy 
~~ Ly \. a =e 
Yi ) \ a 
yy } CKEw«~ 
ee a 
h LE <= 
~ Z G a 
CAA) EN 
babe rail Mey 
es at 
/ : 
: 
4 . 
Fics. 13, 13a.—Petricola esculpturata, sp. n. X 3. 
14, 14a.—Diplodonta satparaensis, sp. n. X I. 
- Tes ‘ x (hinge) 1a. 
15.—Diplodonta barhampurensis, sp. n. X 3. 
15a.— 5 4 (hinge) X 3. 
Family PETRICOLIDAE. 
Petricola esculpturata, sp. n. 
(Figs. 13, 13a.) 
Shell oblong, rather solid, white, showing traces of having 
been covered with a thin pale greenish brown periostracum, con- 
centrically striate with lines of growth, but without other sculp- 
ture; umbones small, not very prominent, very anteriorly situa- 
