308 Records of the Indian Museum. [VoL. XI, 
Family SCROBICULARIIDAE. 
Theora opalina, Hinds. 
Proc. Zool. Soc. London, 1843, p. 78 (as Neaera). 
Main channel W. of Satpara Id., 3-8 ft.; main channel be- 
tween Satpara and Barnikuda, 6 ft.; 2-8 miles N.E. } E. of Kali- 
dai, 5-6 ft.; 1 mile N.E. by E. of Chiriya Id., 54-6? ft.; Serua 
Nadi, 5-9 ft.; 1-14 miles off Kalupara Ghat, 6-7 ft.: channel be- 
tween Satpara and Barhampur Id., 6-8 ft. 
Cumingia hinduorum, sp. n. 
(Figs. 22, 22a, p. 307.) 
Shell ovately rhomboidal, very thin, greyish, concentrically 
striate with growth lines only; umbones small; not very promi- 
nent; dorsal margin arched; ventral margin anteriorly rounded, 
posteriorly sloping; anterior side produced, rather sharply 
rounded; posterior side very obtusely rostrate; hinge normal. 
Long. 6°5, lat. 9g mm. 
Hab.—Main channel W. of Satpara Id., 3-8 ft. (Tvfe); chan- 
nel off Barhampur Id., 6-9 ft.; Mahosa, southwards towards 
sandhills, 4-8 ft ; 3-4 miles E. by S. 4S. of Patsahanipur, 5-54 
ft.; channel between Satpara and Barnikuda, 6-10 ft.; south- 
wards from Mahosa, 5-9 ft.; Mahosa, Barhampur Id. 
Sub-order ANATINACEA. 
Family CUSPIDARIIDAE. 
Cuspidaria annandalei, sp. n. 
(Figs. 23° 23@, (pp. 307.) 
Shell small, irregularly triangulate, thin, yellowish white, 
except for the posterior prolongation and ventral margin which 
are covered with a light brown, membranaceous periostracum, 
concentrically striate, both valves being obliquely angled from 
the umbones downward, the angle being more accentuated in the 
tight valve and extending to the ventral margin on the posterior 
side; umbones small, somewhat prominent; dorsal margin ante- 
riorly arched, posteriorly gently sloping; ventral margin gently 
rounded especially anteriorly; anterior side rounded; posterior 
side rostrately produced, obliquely truncate, bearing a depression 
in both valves for about three-fourths of its length. 
Long. 4, lat. 6°5 mm. 
Hab.—4-9 miles E. by S. 4S. of Patsahanipur, 4-5 ft. (Type); 
Serua Nadi, 5-9 ft.; 4-7 miles E.4 S. of Patsahanipur, 4-4} ft.; 
about 4 miles E.N.E. of Kalupara Ghat, 6-7 ft.; 4-9 miles E. } S. 
of Barkul bungalow, 54-5} ft.; 1-14 miles off Kalupara Ghat, 
6-7 ft.; 1 mile S. of Kalidai, 4-8 ft.; Nalbano and channel S.E. 
of Nalbano, 4-8 ft.; main channel W. of Satpara Id., 3-8 ft.; 
main channel between Satpara and Barnikuda, 6 ft.; Mahosa, 
Barhampur Id. 
