HELIX. 73 



H. LAMELLATA, Jeffreys. 



Minute, conoid-globose, with longitudinal membranaceous 

 lamellaj that are not spinous ; mouth lunate. 



Plate CXVII. fig. 8, 9. 



Heliw lamellata, Jeffreys, Trans. Linn. Soc. vol. xvi. p. 333, 507. — Gray, 

 Manual L. and F.W. Shells, p. 150, pi. 5, f. 48.— Thompson, 

 Ann. Nat. Hist. vol. vi. p. 2G. — Macgillivra y, Moll. Abeid. 

 p. 86. — Brown, Illust. Conch. G. B. p. 47. — Chemn. (ed. 

 Klist.) Conch. Cab. Helix, no. 179, pi. 33, f. 13, 14.— L. 

 Pfeif. Monog. Helic. vol. i. p. 51. 

 ,, Scarburgensis, Bean, MSS. cited by Alder, Trans. Nat. Hist. Soc. 

 Northumb. vol. i. p. 36, Mag. Zool. and Bot. vol. ii. — Tuht. 

 Manual L. and F. W. Shells, p. 62, f. 48. — Aldek, 

 p. 189. — A. MtJLLER, Wiegm. Arch. Naturg. 1838, pt. 1, 

 p. 208, pi. 4, f. 4. — RossMASSL. Iconog. Land und Siissw. 

 Moll. pt. viii. p. 37. 

 „ semimdum, Rossmassl. Iconog. Land und Siissw. Moll. f. 533. 



Shell minute, conoid-globose, nearly as high as broad, 

 thin, a little transparent, not polished, but usually with 

 a satin-like gloss, of an uniform pale yellowish horn-colour ; 

 adorned with rather close and numerous longitudinal mem- 

 branaceous laminae, which do not shoot into spinous pro- 

 cesses. Spire raised, about the same height as the body- 

 whorl ; apex rather blunt. Volutions five or six, well 

 rounded, strongly defined, gradually and not abruptly en- 

 larging. Aperture depressed, narrow crescent-shaped, not 

 projecting much beyond the preceding whorl, broader than 

 high, scarcely equal to half the total diameter. Peristome 

 thin, simple (destitute of an internal rib), not reflected 

 except very slightly upon the pillar lip. Base tumid, rather 

 suddenly shelving in the middle round the deep but small 

 umbilicus. Diameter the tenth of an inch. 

 The animal is pale grey. 



This curious little snail was formerly supposed to be 



VOL. IV. L 



