PALUDINIDA. 27 
var. spheericula. 
Paludina sphericula, Deshayes, lt. v., Cambodia. 
2 Cochin-China; ex c. P. Bouvier, Esq. 
These are, I think, the form called P. sphericula; unfortu- 
nately they are not quite adult! They present the sharp angu- 
lation of the columellar margin at base, said to be characteristic 
of P. rattrei ; may this not arise from the form not being adult? 
Long. 244, diam. 202 mil. 
25. Paludina lurida. 
Paludina lurida, Morelet, Rev. Zool. 1862, Saigon : long. 21%, diam. 17 mil. 
1 Cochin-China; ex c. A. Morelet, Esq. 
Very close to typical P. crassa; it also much resembles the 
Tenasserim specimen of P. siamensis, var. burmanica, but is 
larger, with more exserted spire and less obtuse apex. 
26. Paludina dissimilis, 
Nerita dissimilis, Miller, Hist. Verm. 1774, Loe.?; Con. Indica, pl. 77, 
Jigs. 2—8 ; P.remossti, “ Benson,” Phil., Abb. 1846, Meywar (typog. error 
for P. premorsa, Benson, Ms.), and Con. Indica, pl. 77, figs. 8—9, Toun- 
pore, Fe.; juv. = P. carinata, Swainson, Zool. Ill. IT, 1822, Ganges; 
Srom Philippines and Siam, fide Morelet, Ser. Con, IV, p. 310. 
30 Calcutta, Chandernagar, &c.; coll. G. Nevill, Esq. and Dr. F. Stolicazka, 
18 Négpur, Derbund and Salt-Range; ex c. Dr. F. Stoliczka. 
5 Naini-Tal (?); coll. Dr. T. Oldham. 
7 Purneah, Birbhim and Benares; coll. Dr. J. Anderson, J. Wood- 
Mason, Esq. and Colonel G. B. Mainwaring. 
1 Ségar; ex Mr. Sowerby [ex c, Lombe Taylor]. 
This last a magnificent specimen—long. 274, diam. 21 mil.— 
searcely angulate at the periphery, with the white belt sub- 
obsolete, was labelled “ P. olwwacea.” 
subvar. Subobtusa, nov. 
3 Chdndballi; coll. G. Nevill, Esq. 
The whorls have not the peculiar, convex shape of var. obtusa. 
It is probably the P. melanostoma of Benson, Ms., but not of 
Reeve! I described it without a name Cat. Moll. Fasc. E., 
p. 38: long. 264, diam. 21 mil.: decollate, 3 whorls only 
remaining. 
