Ig15.] H.B. Preston: Mollusca from Lake Chilka. 293 
Stenothyra chilkaénsis, Preston. 
Rec. Ind. Mus., X, p. 300. 
Serua Nadi, 5-9 it.; 4-9 miles E., 4S. of Barkul bungalow, 
54-52 ft.; channel off Barhampur Id., 6-9 ft.; 1 mile N.E. by 
E. of Chiriya Id., 53-62 ft.; channel between Barnikuda and 
Satpara, 64 ft.; off Barnikuda, inside lake, 6 ft.; 2-8 miles N.E. 
4 E. of Kalidai, 5-6 ft.; 1 mile S. of Kalidai, 4-8 ft.: between 
Barkuda and mainland, 6-8 ft.; Nalbano and channel S.E. of 
Nalbano, 4-8 ft.; southwards from Mahosa, 5-9 ft.; S.E. of 
Barkuda and Samel Id., + mile off shore, 6 ft.; channel from 
Satpara towards Barnikuda, 9-12 ft. 
Stenothyra orissaensis, Preston. 
T.c., pp. 300-301. 
Serua Nadi, 5-9 ft.; Rambha Bay, about 6 it. of water, 
among weeds; about 4 miles E.N.E. of Kalupara Ghat, 6-7 ft.; 
I mile N.E. by E. of Chiriya Id., 54-63 ft.: Nalbano and chan- 
nel S.E. of Nalbano, 4-8 ft.; 2 miles N.E. by N. 3 N. of Kalidai, 
ait, 
Stenothyra trigona, sp. n. 
(Fig. 3, p. 192.) 
Shell rimate, thin, turrite, semitransparent, greyish white; 
whorls 5, smooth, rather rapidly increasing, the last inflated, 
ascending a little in front; suture impressed, margined below; 
perforation appearing as a narrow and not very deep chink; 
columellar lip descending in a curve; labrum continuous; aper- 
ture oblique, ovate. 
Alt. 2°5 (nearly), diam. maj. 1°5, diam. min. I mm. 
Hab.—Lake Chilka, opposite Barkul bungalow (Tye); Ram- 
bha Bay, among weeds; Serua Nadi, 5-9 ft.; 1 mile N.E. by E. 
of Chiriya Id., 53-6? ft.; Nalbano and channel S.E. of Nalbano, 
4-8 ft. 
Stenothyra obesula, sp. n. 
(Fig. 4, p. 291.) 
Shell rimate, ovately fusiform, of an olive colour; whorls 4, 
smooth, the first three small and regularly increasing, the last 
large, inflated, descending in front; suture impressed, very 
narrowly margined below; perforation reduced to a mere chink; 
labrum continuous, the margin dark brown; aperture slightly 
oblique, ovate; operculum normal. 
Alt. 3°25, diam. maj. 2°25 mm. 
Hab.—Southernmost island of Manikpatna series. 
This species stands out, owing to the obese form of the last 
whorl, from any other yet described from the Indian region. 
