Genus LIMN^A. 



Limnaa, Lamarck, 3799, Meiu. Soc, Hist. Nat., Pari.'=, p. ?•'>, as 

 Lymn<pa, emend. Rang, ]8l^9, Man. de I'Hist. Nat., Moll. p. 176; 

 Sowerby iu Reeve, Con. Icon, xviii, etc. 



Helix, Linn., Gmelin, Burrow. 



Bucimmi, Mdller. 



Bulhnus, Roiret, Bniguiere. 



Limiuens, Draparnand, Born. 



Linmcea, Lnmarck, Nilssou. 



Stagnicola, Leach. 



Limncciis, auct. reliq. 



TypE, L. staf/naZts (Limiseus) ; Europe generally. 



Ramje. World-wide. 



Shell dextrally spiral, horny-testaceous, ovate or pyramidal, 

 covered with a thin epideruiis ; spire acuuiiiiated, whorls generally 

 turreted, inner lip of the aperture narrowly spread on the hody- 

 v\liorl, generally with a single plait. No operculum. 



Animal rather long and twisted in a spiral coil ; head proraineut ; 

 tentacles short, triangular and flattened; foot oblong, bilobed or 

 notched in front and obtusely rounded behind. 



Section LIMNAA (sensu stricto). 

 For characters, type and range, see above. 



210. Limnsea (Limnsea) stagnalis (Lhinmis). 



Limnceus, Linn., 175S, Syst. Nat. 10th ed. p. 774, as Helix stacjualis 



•AwA frag His. 

 Limnaa (Limna'a) stagnalis, Lamarck, 1801, as Lymncpa stagnalis, 



Syst. Anini. sans Vert. p. 91 ; Sowerby in Reeve's Conch. Icon. 



xviii, pi. 1, no. 4 ; IL & T., C. 1. 1870, p. xvi. 

 Lymncea stagnalis, in Reeve, L. & F. W. Moll. British Isles, p. IGO. 



"Shell: ovately turreted, compressly umbilicated, rather thin, 

 yellowish horny, spire produced and sharply acuminated; whorls 

 live to six, slopingly convex round the upper part, then ventricose, 

 striated in the direction of the lines of growth, sometimes evanes- 

 cently obscurely irregularly ridged and malleated in the opposite 

 direction ; aperture moderate, somewhat squarely ovate, columella 

 callously twisted, lip broadly appressly dilated over the umbilicus." 

 (^liecve.) 



Alt. 47*5, diam. 22*5 mm. (spec). 



Ilab. Europe ; Afghanistan ; Kashmir. 



211. Limnsea (Limnsea) acuminata, Lamnrcl-. 



Limnaa {Linmcea) acvminata, Lamarck, Anini. s. Vert, vi, pt. 2, 

 p. KJO ; Deles. Rec. Coq. Lam. pi. MO, fig. 6 ; H. & T., C. 1. pi. 69, 

 tigs. 8, 9; Sowerby, in Reeve's Couch. Icon, xviii, pi. 10, no. 66. 



Original description: — Testa ovato-ventricosa, tenuissima, 

 hyalina, subalbida ; spira brevissima, apice acuminata. 

 Ait. 25 mm. 

 Jfnh. Benual: o^} miles S.E. of liin'Mjla. etc. 



