66 COLIMACEA. 



99; Helije nitidula, V. Alten, S. 53, pi. 4, f . 8 ; Helix fulva, 

 Brown, Illust. Conch., p. 46, pi. 17, f. 2 ; lb., First Ed., pi. 40, 

 f. 2. 



Varietif 1 . Shell depressed, and equally convex both above 

 and below. 



Helix Mortonii, Jeffreys, Linn. Tr., XVI, p. 332. 



Variety 2. Smaller, and of a darker colour. 



Helix Alderi, Alder, Mag. Zool. and Bot., II, p. 108. 



Shell trochiform, thin, smooth, glossy, pellucid, of a dark- 

 brownish horn-colour, sometimes inclining to a reddish hue; 

 body large, ventricose; spire small, much produced, and having 

 five inflated volutions, deeply divided by the sutural line, ter- 

 minating in a rather obtuse apex ; base rounded, and provided 

 with a very small umbilicus, which is hardly perceptible in the 

 young shell ; aperture subluniform, transversely compressed, its 

 length and breadth being equal; outer lip thin; pillar lip slightly 

 reflected over the umbilicus. Diameter about one-eighth of 

 an inch. 



The small variety of this shell, noticed by Joshua Alder, 

 Esq., of Newcastle, has very fine concentric striae on its base, 

 which is only visible by the aid of a strong lens. This variety 

 is only one-tenth of an inch in diameter. 



Inhabits woody and shaded situations, under stones, on de- 

 cayed timber, and under leaves. Montagu mentions it as a 

 Devonshire and Wiltshire shell. It has also been found in the 

 North of England ; and Thompson says it is generally dis- 

 tributed over Ireland, from the sea shore to mountain localities. 

 At Wolfhill, he found thirty specimens congregated under one 

 stone. 



15. Helix fusca, pi. VII, f. 19, 20. 



Helix fusca, Montagu, Test. Brit., p. 424, pi. 13, f. 1 ; Brown, 

 Ency. Brit., p. 460; Fleming, Edin. Ency., VII, p. 81; lb., 

 Brit. An., p. 264; Maton and Rackett, Linn. Tr., VIII, p. 209; 

 Jeffreys, Linn. Tr., XVI, p. 329, 394, and 507 ; Alder, Mag. 

 Zool. and Bot., II, p. 107; Turton, Man., p. 53, f. 36; lb.. 

 Conch. Diet., p. 946; lb., Brit. Fau., p. 191 ; Thompson, Ann. 

 and Mag. Nat. Hist., VI, p. 24 ; Brown, Illust. Conch., p. 47, 

 pi. 17, f. 25, 26; lb., First Ed., pi. 40, f. 25, 26; Helix Zeno- 

 bia corrugata, Gray, Med. Rep., 1821, p. 239- 



