70 COLIMACEA. 



Helix revelata, Ferussac, Prod., p. 44 ; Michel, Compl., p. 

 27} pi. 15, f. 6, 7, 8; Deshayes, Lam. An. Sans. Vert., VIII, 

 p. 83; Brown, lUust. Concli., p. 48, pi. 17, f. 3, 4, 5; lb., First 

 Ed., pi. 40, f. 3, 4, 5. 



Shell subglobose, thin, subpellucid, of a pale yellowish-green 

 colour ; body large ; spire small, consisting of three moderately 

 raised volutions, ending in a subobtuse apex ; base not much 

 raised, and provided with a narrow umbilicus ; aperture sublu- 

 nate, very oblique, and rather rounded ; outer lip thin, and 

 very slightly reflexed ; pillar lip a little reflected over the um- 

 bilicus, and shewing only the base of the penultimate volution ; 

 surface covered with a few scattered grayish hairs, which, when 

 removed, reveal a shghtly wrinkled exterior. Diameter about 

 a quarter of an inch. 



Discovered by me on the Lomond Hills, Fifeshire, Scotland, 

 and named Vitrina membranacea in the first edition of this 

 work; it has since been met with by Professor Forbes in shady 

 places, among nettles, near Dolyle's Monument, in Guernsey, 

 where it is not uncommon. 



20. Helix sericea, pi. VII, f. 28, 29. 



Helix sericea, Miiller, Verm. Hist., II, p. GO, No. 258; Dra- 

 pernaud, p. 103, pi. 7, f. 16, 17 ; Pfeiffer, I, p. 34, pi. 2, f. 17 ; 

 Kenyon, Mag. Nat. Hist., I, p. 427, f. 3 ; Alder, Mag. Zool. 

 and Bot., II, p. 107; Thompson, Ann. and Mag. Nat. Hist., 

 VI, p. 26; Rossmassler, Icon., VII, p. 2, pi. 31, f. 428, 429; 

 Brown, Illust. Conch., p. 48, pi. 18, f. 43, 44. 



Shell subglobose, thin, diaphanous, subpellucid, and of a 

 reddish horn-colour, with a nearly obsolete, spiral girdle sur- 

 rounding the body volutions, producing a somewhat carinated 

 aspect ; body subdepressed, very tumid on the sides, consider- 

 ably longer than the spire, which consists of four moderately 

 rounded, gradually tapering volutions, terminating in a subob- 

 tuse apex ; base not very prominent, with a rather small umbili- 

 cus ; aperture sublimate, its length and width nearly equal ; 

 outer lip thin, destitute of an internal rib ; pillar lip a little 

 reflected over the umbilicus; whole shell covered with a brown 

 epidermis, beset with remote, rather elongated, recurved, soft 

 hairs, which, when removed, exposes a slightly wrinkled exte- 

 rior. Diameter about a quarter of an inch. 



