LIMNiEUS. 175 



Moll. pt. 1, p. 95, pi. 2, f. 49, and pi. 5, f. 83, 84, 85.— 



Cantr. Mem. Ac. Brux. vol. xiii. p. 159. — Philippi, Moll. 



Sicil. vol. ii. p. 120. — Stein, Schnecken Berlins, pi. 2, f. 13. 

 Lymncea stagnalis, Lam. Anim. s. Vert. (ed. Desh.) vol. viii. p. 408. — Brown. 



Illust. Conch. G. B. p. 28, pi. 15, f. 19 to 23. -Nils. Moll. 



Suec. Ter. et Fluv. p. 60. — Sowerby, Conch. Manual, 



f. 308. 

 Limnea „ Sowerby, Genera Shells, Lim. f. 1. — Fleming, Brit. Anim. 



p. 273. — Bouillet, Moll. Auvergne, p. 69, animal. — Gr as, 



Moll. Ter. et Fluv. France, p. 63. — Reeve, Conch. Syst. 



vol. ii. pi. 191, f. 1. — Mermet, Moll. Pyren. p. 66. 

 Limneus major, Jeffreys, Trans. Lin. Soc. vol. xvi. p. 375. 

 Limnea fragilis, Fleming, Brit. Anim. p. 273. 



Limneus „ Turt. Manual L. and F. W. Shells, p. 121, f. 105. 

 Stagnicola vulgaris, Hartm. Erd und Sussw. Gaster. pi. 8, 12. 



Shell ovate acuminated, or turreted oblong-oval, the 

 body being abruptly larger and inflated, the spire pro- 

 duced and of a sudden narrowly conical ; horn-coloured 

 (sometimes pallid, sometimes ochraceous), wrinkled length- 

 ways (at times, though rarely, somewhat plicately so), the 

 surface beneath a powerful glass appearing exquisitely 

 chased by dense spiral series of short and often scarcely 

 interrupted longitudinal scratches. Whorls fully seven, 

 elongated, tapering to a fine point, of rapid longitudinal 

 increase, peculiarly attenuated and flat-surfaced above, 

 convex or rounded below, at times appearing subangulated 

 (especially the body) from this contrast ; suture simple, 

 slanting, profound, the area beneath it sometimes edged 

 with white ; the apical coils rounded. Body long, its 

 rounded swell a little depressed in the middle ; basal de- 

 clination convex, more or less gradual. Mouth capacious, 

 rounded below, variable in shape, in the more typical 

 examples of a peaked and unsymmetrical ovate or oval 

 figure, occupying about one half (usually rather more) 

 of the ventral length. Outer lip prominent, a little dis- 

 posed to expand, its arch for the most part more or less 



