1916. } H. B. Preston : South Indian Mollusca. 37 
The colour of the shell varies from pale yellowish-green ia 
certain specimens to the dark olive of the type, the paler speci- 
mens showing a number of narrow, transverse, radiate, reddish 
or purple bands. 
Velorita delicatula, sp. n. 
Shell small, trigonal, dark olive gray; both valves sculp- 
tured in the umbonal region 
with fine, distant, concentric 
ridges which suddenly be- 
come much more serried and 
numerous, continuing thus 
throughout the remainder of 
the shell; umbones small, 
inwardly bent; dorsal mar- 
gin sharply arched; ventral 
margin slightly rounded, a 
little contracted posteriorly ; 
anterior side rather sharply 
rounded; posterior side slop- 
ing above angularly round- 
ed and a little rosirate below. 
Long. 5, lat. 6 mm. 

Hab. — Cochin back- Fics. 13, 13a.— Velortta delicatula, 
: sp.n. X 4. 
water, near Ernakulam pig, 139.— ae Ble oe 
(F. H. Gravely). 
Family SOLENIDAE. 
Cultellus subellipticus, Dunk. 
Proc. Zool. Soc. London, 1861, p. 421. 
Ennur backwater, Madras (two young specimens). 
Solen fonesi, Dunk. 
Proc. Zool. Soc. London, 1861, p. 419. 
Cochin backwater, near Ernakulam (F. H. Gravely). 
Order DIBRANCHIA. 
Suborder LUCINACEA. 
Family LUCINIDAE. 
Codokia fischeriana, Issel. 
Mal. del Mar. Rossv, 1869, p. 83. 
Ennur backwater, Madras. 
