P ALUDIN A. 



Plate III. 



Species 10. (Mus. Cuming.) 



Paludina pr.^irosa. Pal. testa conico-titrbinata, crassd, 

 solidd, oUvacea, apice erosd, aiifractlbiis subaiigustis, 

 ad sutiiras constrictis, delude decUvi-rotmidatis, nndi- 

 qiie oblique jil/cato-sdnntis, striis rudibus, valde Irre- 

 gularibus. 



The eroded Paludina. Shell conically tiirbinated, 

 thick, solid, olive, eroded at the apex, whorls rather 

 narrow, constricted at the sutures, then slopingly 

 rounded, everywhere obliquely plicately striated, 

 strias rude, very irregular. 



Gerstfeldt, Land und Siiss. Moll. Sib. und Amur- 

 Geb. Part I. p. 5, pi. 1, f. .5 to 7. 



Hob. Mouth of the Ussuri, a tributary of the river Amoor, 

 Siberia ; Gerstfeldt. 



A shell of remarkably solid growth, unusually constricted 

 at the sutures. 



Species 11. (Fig. a, b, Mus. Cuming.) 



Paludina Cumingii. Fal. testa omto-conlcd, olivaced ; 

 anfraclibiis sitbaugmtis, rotundalis, saperne impresso- 

 planis, undique niiriute decmsatim striatis ec mallentis. 



Cu.ming's Paludina. Shell ovately conical, olive ; whorls 

 rather narrow, rounded, impressly flattened at the 

 upper part, everywhere minutely decussately striated 

 and malleated. 



Hanley, MS. in Mus. Cuming-. 



Hab. Cidanang, Province of Baic, Island of Luzon, Phi- 

 lippines. 



Distinguished from the European P. coutecta, which it 

 nuich resembles in the roundness of the whorls and in the 

 decussately-striated malleated character of the surface, by 

 the peculiar impressed flatness of their upper edge next 

 the sutures. Paludina Cumiugii, D'Orbigny, is a species 

 of Paludedrina. 



Species 12. (Mus. Cuming.) 



Paludina ampullacea. Pal. testa subgloljoso-cokicd, 

 Jlavesce>ite-oUmced, atifractibus subaiigustis, tmii.ido- 

 rotundatis, lougiludinaliter dense striatis et ttialle- 

 atis. 



The bottle Paludina. Shell somewhat globosely co- 

 nical, yellowish-olive, whorls rather narrow, tumidly 

 rounded, longituilinally densely striated and malle- 

 ated. 

 Chakpentier, MS. in Mus. Cuming. 

 Hab. Italy. 



This tine species is not striated spirally, but only longi- 

 tudinally, and the whorls are \inusually widely convoluted. 

 It may prove to be a gigantic form of P. coutecta. 



Species 13. (Fig. a, b, Mus. Cuming.) 



Paludina Japonica. Pal. subpyramiduli-ovatd, vires- 

 cente-olivaced, nitente, atifractibus couvexo-declivibus, 

 iiiferue obtuse angulatis et carinatis, longitudinaliter 

 plicato-slriatis, striis versus aperturam confertioribus 

 rugosis. 



The Japan Paludina. Shell somewhat pyramidally 

 ovate, greenish-olive, shining, whorls convexly slo- 

 ping, obtusely angled and keeled round the lower 

 part, longitudinally ])licately striated, strias closer and 

 rough towards the apertiu'e. 



Martens, Malak. BlJitt. vol. vii. p. 44. 



Hab. Japan. 



A vei'y distinct form of Paludina, in which the whorls 

 slope to an obtuse angle at the lower part, the angle falling 

 in the place of the suture. 



Species 14. (Mus. Cuming.) 



Paludin.4. angulakis. Pal. testa elevato-conicd, satu- 

 rate olivaced, anfraclibiis subangustis, fortiter decits- 

 satim striatis, superne angulatis, costis tenuibus tribus, 

 liris duabus in inlerstitiis, spiraliler funiculatis. 



The angular Paludina. Shell elevately conical, 

 tlark-olive, whorls rather narrow, strongly decussately 

 striated, angled round the upper part, spirally corded 

 with thi-ee tine riljs, having two faint ridges in the 

 interstices. 



Nerita angularis, Miiller, Hist. Verm, part 2. p. 187. 

 Helix angularis, Gmelin. 

 Paludina angularis, Philippi. 



Hub. Manila, Island of Luzon, Philippines ; Cuming. 



Closely allied to P. costata, but it is a more delicately- 

 formed shell, of a brighter olive colour. 



June, 18G2. 



