LIMN^US. 179 



Bulimus leucostoma, Poiret, Prorlr. p. 37 (teste Michaud). 



Helix octanfracta, Mont. Test. Brit. p. 396, 588, pi. 11, f. 8. — Maton and 



Rack. Trans. Linn. vol. viii. p. 211. — Rack. Dorset 



Catalog, p. 55, pi. 18, f. 11.— Turt. Conch. Diction, p. 64. 



—Wood, Index Testae, pi. 35, f. 149. 

 „ pereffrina, Dillw. Recent Shells, vol. ii. p. 954. 

 Limneus elonyatus, Drap. Moll. Ter. et Fluv. France, p. 52, pi. 3, f. 3, 4. — 



Jeffr. Trans. Linn. Soc. vol. xvi. p. 376, 520. — Turt. 



Conch. Man. p. 122, f. 106. 

 Lymncea leucostoma, Lam. Anim. s. Vert. (ed. Desh.) vol. viii. p. 414. 

 Linmceus elonyatus, Pfeif. Deutsch. Land und S'ussw. Moll.pt. 1, p. 92, pi. 4, 



f. 26. — Rossmassl. Iconog. Land und S'ussw. Moll. pt. I, 



p. 101, pi. 2, f. 58. 

 Limnea octona, Flem. Brit. Anim. p. 274. 



„ elonffuta, Sowerby, Genera Shells, Lim. f. 6. — Reeve, Conch. Syst. 



pi. 191, f. 6.— Mermet, Moll. Pyren. p. 68. 

 Li ni nanus glaber, Gray, Turt. Man. L. and F. W. Shells, p. 242, pi. 9, f. 106.— 



Stein, Schnecken Berlins, pi. 2, f. 9. 

 Limnea leucostoma, Gras, Moll. Ter. et Fluv. France, p. 65, pi. 5, f. 5. 

 Lymnaa clongata, Nils. Moll. Suec. Ter. et Fluv. p. 71. — Brown, Illust. 

 Conch. G. B. p. 29, pi. 15, f. 1, 2, 3, 5. — Schub. and 



Wagn. Conch. Cab. vol. xii. p. 181, pi. 235, f. 4132, 4133. 



Shell turreted-subcylindraceous, the slender body being 

 nearly equally broad throughout, and the spire slowly 

 tapering to a fine point ; thin, somewhat glossy, pale horn- 

 coloured, slightly wrinkled lengthways, the ordinary mi- 

 croscopic chasing less distinct than in most of the genus. 

 Whorls more frequently seven, occasionally nine, rather 

 high, of slow increase, simply convex, or moderately 

 rounded in the middle, slightly attenuated, but not at all 

 planulate above, swelling out at once from the very pro- 

 found and but moderately slanting suture. Body not 

 quite occupying half of the dorsal length, its surface 

 rounded but not inflated ; basal declination not abrupt. 

 Mouth small, oblong-acute, filling rather more than a 

 third of the ventral length, rounded and much receding 



The figure (72) in Turton's Manual, is so bad that PfeifFer has cited it with 

 doubt for A. semitarum, but from the description (Conch. Diction, p. 63; Man. 

 L. and F. Shells, p. 90) we know it to be intended for octona. 



