PALUDIN A. 



Plate VIII. 



Species 43. (Mus. Cuming.) 



PALtDiNA Hainesiana. Pal. testa oUique ylobom, 

 solidd, oUvaeeii, anfractibus ad mturas itiipressis, 

 deinde declivi-convexis, versus basin gibbosis, ubijue ob- 

 lique pUcato-striatis, spiraliter miuutissime punclu- 

 ratis ; apertiird ovaid. 



Haines' Paludina. Shell obliquely globose, solid, 

 olive, whorls impressed at the sutui'es, then slopingly 

 convex, gibbous towards the base, everywhere ob- 

 liquely plicately striated, spirally very minutely 

 punctured ; aperture ovate. 



Lea, MS. in Mus. Cuming. 



Hub. Siam. 



A solid globose shell, stUl bearing a crowded profusion 

 of the very minute punctures characteristic of the Eastern 

 species. 



/;*" 



Species 43. (Mus. Cuming.) 



Paludina Cyclostomatiformis. Fal. tesfu cyUndraceo- 

 turritd, solidd, oUvaced, aiifractihiis rotiiiulatis. Item- 

 bus, ad sutnras conslricto-impressis ; aperlurd obliijue 

 ovatd, parvd. 



The Cyclostoma-shaped Paludina. Shell cylindri- 

 caUy tun-eted, solid, olive, whorls rounded, smooth, 

 constrictedly impressed at the sutures ; aperture 

 obliquely ovate, small. 



Lea, Trans. Amer. Phil. See. vol. ix. part i. p. 3-3. 

 Paludina contorta, Shuttleworth. 

 Paludina EUiolti, Lea. 

 T'ivipara Cyclostoiuatiformis, Biiiney. 



Hah. Coosa Eiver, Alabama, United States. 



Well distinguished from all other species of the genus by 

 its narrow cyliudrically-turreted form and small aperture. 



Species 44. (Mus. Cuming.) 



Paludina subcakinata. Pal. testa (jlohoso-lufrild, 

 Jlavescente-olivaced, spird ad apicem acuta, cafiieo- 

 tinctd, suturis impresso-canaliculafis, anfractibus ro- 

 tuudutis, idiuute decussatim undatu-striatis, superne 

 obtuse carinatis ; aperturd oblique ovatd. 



The faintly-keeled Paludina. Shell globosely tur- 

 reted, yellowish-olive, spire sharp at the apex, flesh- 

 tinted, sutures impressly chauuellcd, whorls rounded, 



minutely decussately wave-striated, obtusely keeled 



round the upper part, aperture obliquely ovate. 

 Say, Nicholson Eucy. pi. i. f. 7. 



Paludina sulculosa, Menke. 



Paludina bicarinata, Potiez and Michaud. 



Helix decisa, Wood. 

 Hab. Alabama, Ohio, etc.. United States. 



Sharp-pointed and flesh-tinged at the apex, whorls 

 rudely tumidly rounded next the sutures, and presenting 

 one or two obtusely developed keels. 



Species 45. (Pig- a, c, d, Mus. Anthony ; Fig. b, 

 Mus. Cuming.) 



Paludina decisa. Pal. testa ovatd, plus minus conicii, 



solidd, vivide viresceute-olivaced, anfractibus concavis, 



sub lente minutissime reticulato-striatis, ad suturas rude 



appressis ; aperturd pi/rifornii-ovatd, fauce callosd, 



cierulescenle-albd. 

 The eroded Paludina. Shell ovate, more or less 



conical, solid, bright greenish-olive, whorls concave, 



beneatli the lens veiy minutely reticulately striated, 



rudely appressed at the sutures ; aperture pyriformly 



ovate, callous, bluish-white within. 

 Say, Nicholson Ency. pi. 3. f. 5. 



Paludina Integra and ponderosa. Say. 



Paludina genicula, Conrad. 



Paludina, limosa, cornea, and ovularis, Yalenciennes. 



Paludina lieterostropha, Kirtland. 



Paludina rufa, Haldeman. 



H(4ix dissiniilis. Wood. 



Paludina subsolida, Anthony. 



Firi/iara ponderosa and decisa, Binney. 

 Hab. Alabama, Georgia, Ohio, etc., United States. 



Par too many species have been made of tiiis well-known 

 and somewhat variable species. The extreme forms are 

 Say's P. Integra (Fig. 45 a), in which the spire is ele- 

 vated, and Conrad's P. genicula (Fig. 45 c, d), in which it 

 is contracted. Kirtland's P. lieterostropha is the same 

 form reversed. Say's P. ponderosa (Fig. 45 b) is an in- 

 termediate form of rudely-developed thickened grow'th. 



Species 41). (Fig. 40 a, JIus. ,\uthony.) 

 Paludina coauctata. Pal. testa pgramldali-couicd. 



Februarv, 18G3. 



