298 Records of the Indian Museum. [Vo.. XI, 
Modiola undulata, (Dkr.). 
Proc. Zool. Soc. London, 1856, p. 363. 
Channel off Barhampur Id., ro-20 ft.; channel between 
Satpara and Barhampur, 8-20 ft.; Nalbano and channel S.E. of 
Nalbano, 4-8 ft. (young examples only); 1 mile N.E. by E. of 
Chiriya Id., 53-6? ft. (young only). 
Var. crassicostata, Preston. 
Rec. Ind. Mus., X, p. 304. 
Serua Nadi, 5-9 ft. (young specimens only); main channel 
W. of Satpara Id., 3-8 ft. (a young specimen). 
Sub-order ARCACEA. 
Family ARCIDAE. 
Arca (Fossularca) lactea, Lin. 
Syst. Nat. p. 1141. 
Channel between Satpara and Barhampur Id., 6-8 ft., and 
8-20 ft.; main channel W. of Satpara Id., 3-8 ft.; Satpara. 
After very careful comparison the author is unable to sepa- 
tate the present shells from the’ common European form, which 
has already been recorded from Bombay and Mergui as well as 
from S. Africa, the Red Sea, Aden, Ascension Id. and (somewhat 
doubtfully) from the Philippines. 
Sub-order ERYCINACEA. 
Family ERYCINIDAE. 
Kellya chilkaensis, sp. n. 
(Figs. 10, Ioa, p. 299.) 
Shell very thin, flattened, oblong-ovate, transparent, pale 
brownish, except towards the margins where it is covered with a 
thin membranaceous reddish brown periostracum, concentrically 
striate; umbones very small; dorsal margin arched; ventral 
margin gently rounded; anterior side obtusely rounded ; poste- 
rior side very slightly produced, rounded; hinge-teeth normal. 
Long. 4°25, lat. 5°75 mm. 
Hab.—Channel between Satpara and Barhampur Id., 6-8 ft. 
(Type); Mahosa, southwards towards sandhills, 4-8 ft.; 1 mile 
S. of Kalidai, 4-8 ft.; channel off Barhampur Id., 6-9 ft.; 4-7 
miles E. 4 S. of Patsahanipur, 4-4} ft. 
Kellya mahosaénsis, sp. n. 
(Fig. 11, p. 299.) 
Shell minute, inequilateral, oblong-ovate, transparent, pale 
yellowish horn colour, reddish at the margins, concentrically 
