BULIMUS. 91 



Tort. Conch. Diction, p. 64. — Alten, Erd und Fluss. Conch. 



Augsburg, p. 98, pi. 12, f. 21. — Dillw. Recent Shells, vol. ii. 



p. 953. 



Bulimus obscurus, Brap. Moll. Terr, et Fluv. France, p. 74, pi. 4, f. 23.— 



Sheppard, Trans. Linn. Soc. vol. xiv. p. 166. — C. Pfeif. 



Deutsch. Land und S'ussw. Moll. pt. 1, p. 52, pi. 3, f. 11. — 



Fleming, Brit. Animals, p. 265. — Jeffreys, Trans. Linn. 



Soc. vol. xvi. p. 345. — Turt. Manual L. and F. W. Shells, 



p. 81, f. 63.— Gray, Manual L. and F. W. Shells, p. 183, 



pi. 6, f. 63. — Thompson, Ann. Nat. Hist. vol. vi. p. 109. — 



Macgilliv. Moll. Aberd. p. 98. — Brown, Illust. Conch. 



G. B. p. 36, pi. 18, f. 13, and pi. 14, f. 21 . — Rossmassl. 



Iconog. Land und S'ussw. Moll. pi. 6, p. 46, f. 387. — 



Charpent. N. Denks. Schweiz. Ges. Nat. vol. i. p. 14, pi. 2, 



f. 1 (Bulimulus). — Porro, Malac. p. 54.— Morelet, Moll. 



Portugal, p. 73. — L. Pfeif. Monog. Helic. vol. ii. p. 124. 



„ hordeaceus, Brug. Encycl. Meth. Vers, vol. i. p. 334. — Lam Anim. s. 



Vert. (ed. Desh.) vol. viii. p. 236. 



Bulinus obscurus, /S, Hartm. Neue Alpina, vol. i. p. 222; in Sturm's Fauna, 



sect. vi. pt. 8, pi. 1. 

 Em obscura, Le.ach, MSS. (cited by Turton).— Beck, Anitl. Kiel. 1846, p. 122. 

 Merdigera obscura, Held, Isis, 1837, p. 917. 

 Bidiminus obscurus, Beck, Index Moll. Mus. Christ. Frid. p. 71. 



The shell so closely resembles the preceding as not to 

 require a separate detailed description. It is only, how- 

 ever, about half its size, being usually three lines and a 

 half long, and from a line and three-quarters to a line and 

 a half broad. The shape is more cylindraceous, the penult 

 volution being almost equally as wide as the body, so that 

 whilst in LacJehamensis the tapering commences from the 

 body, in this species it usually seems to originate from the 

 next turn only. The whorls are decidedly more rounded, 

 and not perceptibly shagreened ; the mouth is rather 

 shorter ; the lips quite white (not merely blanched at the 

 edge), and the outer one more arched in the middle, and 

 rather more disposed to expand. The external colouring 

 is of an uniform yellowish-brown ; but an albino variety is 

 occasionally taken. 



The animal is somewhat rugose, dark grey or brownish 



