1869. | MR. W. T. BLANFORD ON NEW MOLLUSKS, 445 
ing the recent expedition to Yunan. They will be figured, and the 
previously described species enumerated, in Dr. Anderson’s full ac- 
count of his journey, together with his other numerous novelties. 
1. PALUDINA BENGALENSIS, Lam., var. DIGONA (vel P. piGoNA). 
Testa P. bengalensi persimilis, sed decussatim striatula, anfractibus 
superioribus juata suturam angulatis ; ultimo biangulato, et supra 
et infra peripheriam, angulis singulis fasciis fuscis spiralibus 
congruentibus, zona tertia intermedia, aliis basalibus, lineis an- 
gustioribus spiralibus interdum interjectis. 
Long. 233-32 mm., diam. 173-23; apert. 13-173 longa, 103~ 
143 lata. 
Hab. in valle fluminis Iravadi circa Ava, Bhamo, &c. 
Merely a variety of P. bengalensis, and passing insensibly into the 
type in Assam, and into the var. dalteata, Bs. (P. doliaris? Gould), 
in Sylhet. If, however, P. microgramma, v. Martens, P. suma- 
trensis, Dkr., and similar allied varieties be distinguished by a par- 
ticular name, this form should also be so, and may in that case be 
called P. digona. It is perfectly intermediate between P. benga- 
lensis, Lam., and P. orytropis, Bs. 
2. Patuptna pissimtuis, Miill., var. pECussaTULA (vel P. 
DECUSSATULA). 
Testa imperforata, conoideo-ovata, tenuiuscula, olivacea, fascia pal- 
lida subperipheriali in anfractu ultimo plerumque signata, sub- 
glabra, striis incrementi et lineis subconfertis flexuosis spiralibus 
decussata. Apex acutus; sutura mediocriter impressa. Anfr. 
6-7, convexi, ultimus tumidior. Apertura subovata, intus lactea. 
Peristoma tenue, nigrum. Operculum corneum, crassum. 
Long. 25, diam. 173 mill.; apertura 13 longa, 104 lata. 
Hab. Ava. 
Nearer to the variety premorsa of Benson than to any other Indian 
form. It is distinguished by its fine decussating striation. 
The Paludine of British India, like most of the freshwater shells, 
are in endless confusion—a state which has certainly not been re- 
moved by the work of Von Frauenfeld and Reeve. I fully concur 
with the remarks of Von Martens (Malakozoologische Blatter, xiii. 
p- 98) as to the forms figured in Reeve, which are undistinguishable 
as species from P. dissimilis of Miller; indeed I am inclined to go 
much further, and to class such forms as P. crassa, Hutton, and P. 
premorsa, Bens., as varieties also, though they are sufficiently dis- 
tinct to deserve varietal names. The form now described is equally 
deserving of distinction. 
3. MELANIA IRAVADICA, Sp. nov. 
Testa elongato-turrita, tenuis, fusco-olivacea, decollata. Anfr. circa 
7, primi erosi, 3-4 superstites convexi, superi seriebus duabus 
spiralibus nodorum confertorum circumdati, ultimus spiraliter 
liratus, nodis fere vel omnino obsoletis. Apertura rhomboideo- 
