32 Records of the Indian Museum. [VoxL. XII, 
Family NATICcIDAE. 
Natica marochiensis, Gmelin. 
Syst. Nat. p. 3675, No. 15. 
Cochin backwater, near Ernakulam (Ff. H. Gravely) ; Ennur 
backwater, Madras (a single young and dead specimen from each 
locality). 
Family TURRITELLIDAE. 
Vanesia rambhaensis (Preston). 
Rec. Ind. Mus. X, 1914, p. 297 (as Terebra). 
Cochin backwater, near Ernakulam; a single specimen only 
(F. H. Gravely). 
The author is again indebted to Mr. T. Iredale for the above 
generic rectification ; the genus Vanesia was described by A. Adams 
in the Annals and Magazine of Natural History, ser. 3, vol. VIII, 
1851, p. 242, in whose opinion it might be allied to Mesalia and 
here the present writer is inclined to leave it; it certainly is far 
removed from the Opisthobranch genera among which it has found 
a resting place in the British Museum collection. 
Syrnola attenuata (A. Ad.). 
Sowerby, Thes. Conch., II, p. 811, pl. clxxi, fig. 22, 1855 (as Obelzscus). 
Cochin backwater, near Ernakulam; a single dead and worn 
specimen (Ff. H. Gravely). 
Pyrgulina humilis (Preston). 
Fourn Malac. XII, 1905, p.6, pl. 1, fig. 27 (as Pyramidella(Mormula)), 
Rec. Ind. Mus. XI, 1915, pp. 294-295 as Mormula). 
Cochin backwater, near Ernakulam (F. H. Gravely). 
Mr. T. Iredale has again kindly assisted the author to a 
correction of former errors, he having very rightly pointed out 
that the present species should not remain in the genus Mormula 
but should be removed to Pyrgulina. 
var. chilkaensis (Preston). 
Rec. Ind. Mus. X1, 1915, p. 295 (as Mormula). 
Cochin backwater, near Ernakulam; found with the type 
from (F. H. Gravely). 
Family NERITIDAE. 
Theodoxus sowerbyana (Recluz). 
Proc. Zool. Soc. London, 1842, p. 174. 
Ennur backwater, Madras. 
