144 LUWJEADM. 



Planorbis turritus, Muller, Verm. Ter. et Fluv. vol. ii. p. 169. 



Helix marmorata, Gmel. Syst. Nat. p. 3665 (from Schrot. Flttsc. p. 269, 

 pi. 6, f. 9.) 



Phjsa hjptiorum, Drap. Moll. Ter. et Fluv. France, p. 55, pi. 3, f. 12, 13. — 

 Jeffreys, Trans. Linn. Soc. vol. xvi. p. 381. — Brown, 

 111. Conch. G. B. p. 30, pi. 14, f. 60, 61.— Voith. in Sturm. 

 Deutsch. Fauna, sect. 6, pt. 4, pi. 11. — C. Pfeif. Deutsch. 

 Land und Siissw. Moll. pt. 1, p. 97, pi. 4, f. 29, and 

 animal, pi. 1, f. 12. — Lam. Anim. s. Vert. (ed. Desh.) 

 vol. viii. p. 400. — Nills. Moll. Sueciae Ter. et Fluv. p. 57. 

 — Kickx, Moll. Brabant, p. 53. — Charpent. Cat. Moll. 

 Suisse, pi. 2, f. 12. — Cantr. Mem. Ac. Brux. vol. xiii. 

 p. 162. — Gras. Moll. Ter. et Fluv. France, p. 60, pi. 4, 

 f. 41.— Kuster, Conch. Cab. i. sect. 17, pi. 2, f. 9 to 13.— 

 Stein, Schneken Berlins, pi. 2, f. 7. 



Limncu turrita, Sowerby, Genera Shells, Lim. f. 10.— Reeve, Conch. Syst. 

 vol. ii.pl. 192, f. 10. 



Aplexa hypnorum, Fleming, Brit. Anim. p. 276. 



Aplexus „ Gray, Manual Land and F. W. Shells, p. 255, pi. 9, f. 1 1 3 — 



Walker, Test. Min. Rar. f. 54. 



Shell of a narrow oblong-conic shape, thin, lustrous, 

 smooth, of a dark-yellowish horn-colour, marked occasion- 

 ally at the stages of growth with a ferruginous line. 

 Body sub-cylindraceous in the middle, by no means ven- 

 tricose, with a convex and gradual anterior declination. 

 Spire filling three-sevenths of the dorsal length, of five 

 tapering turns, that are barely convex, of moderately 

 fast longitudinal increase, occasionally white beneath the 

 slanting suture : penult volution rather large, moderately 

 high : apex very blunt, and little elevated. Mouth oblong- 

 lanceolate, being very bluntly (often indeed subtruncately) 

 rounded below, gradually and very acutely peaked above, 

 filling rather more than half of the total length, and 

 between a third and a fourth only of the ventral area. 

 Outer lip curling a little inwards, ferruginous at the simple 

 edge, which recedes rather suddenly below, not promi- 

 nently arcuated above, rounded below. Columella white 

 or pink, short, solid, not broad, somewhat raised, not 



