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106 LIMXiElD.I.
Genus LIMN^A.
Lhnntsa, Lamarck, 1799, M^m. Soc. Hist. Nat., Pari.", p. 7o, as
Lymntpa, emend. Rang, 1859, Man. de IHist. Nat., Moll. p. 176;
Sowerby in Reeve, Oon. Icon, xvifi, etc.
Helix, Linn., Gmelin, Burrow.
Sucinum, Miiller.
Bulhnus, Poii'et, Brtjo^uiere.
Limnceus, Drapnrnaud, Born.
Limncea, Lamarck, Nilsson.
Stagnicola, Leach.
Limnceus, auct. reliq.
TYPE, L. stagnalis (Linnaeus) ; Europe generally.
llaruje. World-wide.
Shell dextrally spiral, horny-testaceous, ovate ov pyramidal,
covered with a thin epidermis ; spire acuminated, whorls generally
turreted, inner lip of the aperture narrowly spread on the bodywhorl,
generally with a single plait. No operculum.
Animal rather long and twisted in a spiral coil; head prominent;
tentacles short, triangular and flattened; foot oblong, bilobed or
notched in front and obtusely rounded behind.
Section LIMN^A (sensu sfricto).
For characters, type and range, see above.
210. Limnsea (Limnsea) stagnalis (Limiceus).
Limnceus, Linn., 1758, Syst. Nat. lOth ed. p. 774, as Helix stagnalis
anifragilis.
Limncsa (Limnaa) stagnalis, liamarck, 1801, as Lymnma stagnalis,
Syst. Anim. sans Vert. p. 91 ; Sowerby in Reeve's Conch. Icon.
xviii, pi. 1, no. 4 ; II. & T., C. I. 1876, p. xvi.
Lymncea stagnalis, in Reeve, L. & f. W. Moll. British Isles, p. 160.
'^ Shell: ovately turreted, compressly umbilicated, rather thin,
yellowish horny, spire produced and sharply acuminated; whorls
five to six, slopingly convex round the upper part, then ventricose,
striated in the direction of the lines of growth, sometimes evanescently
obscurely irregularly ridged and malleated in the opposite
direction ; aperture moderate, somewhat squarely o\ate, columella
callously twisted, lip broadly appressly dilated over the umbilicus."
{Reeve.)
Alt. 47"5, diam. 22-5 mm. (spec).
Hab. Europe; Afghanistan ; Kashmir.
211. Limnsea (Limnsea) acuminata, Lamarclc
Limncea {Limncea) acuminata, Lamarck, Anim. s. Vert, vi, pt. 2,
p. 160 ; Deles. Rec. Coq. Lam. pi. SO, tig. 6 ; H. & T., 0. I. pi. 69,
tigs. 8j 9; Sowerby, in Reeve's Couch. Icon, xviii, pi. 10, no. 66.
Ori-ginal description : — Testa ovato-ventricosa, tenuissima,
hyalina, subalbida; spira brevissima, apice acuminata.
Alt. 25 mm.
JIab. Bengal; liO miles S.E. of liingola, etc.