FAMILY COLIMACEA. 75 



lip arises from the mantle of the animal being produced around the 

 aperture in concentric overlapping segments. 



The name " Stone-cutter" was probably given to this species by 

 Linnseus, from the circumstance of the animal having been observed 

 to absorb indentations on the surface of limestone rocks, after the 

 manner of H. aspersa and others. 



13. Helix rufescens. Rufous Helix. 



Shell ; moderately deeply umbilicated, subglobosely depressed, 

 thin, reddish or pale yellow, spire obtusely con- 

 vex, whorls six, slopingly convex, densely minutely 

 striated, faintly keeled and pale-banded at the 

 periphery ; aperture obliquely lunar- circular, Hp 

 thin, a little expanded, a milk-white rib at a short 

 distance in the interior. 

 Helix rufescens, Pennant (1777), Brit. Zool. ed. iv. vol. iv. 



p. 134. pi. lxxxv. f. 127. 

 Helix circinata, ccelata, and montana, Studer (1820), Kurz. Yerz. p. 86. 

 Helix corrugata and clandestina, Hartmann (1821), Neue Alp. vol. i. p. 256. 

 Helix striolata, C. Pfeiffer (1828), Deutsch. Moll. vol. in. p. 28. pi. vi. f. 8. 

 Teba rufescens, Leach (1831), Turt. Man. p. 96. 



Bradybcena rufescens, ccelata, and circinata, Beck (1837), Ind. Moll. p. 20. 

 Fruticicola circinata, Held (1837), Isis, p. 914. 

 Helix nifina, Parreys (1841), Pfeiff. Synib. part 1. p. 39. 

 Helix (Zenobia) rufescens, Moqnin-Tandon (1855), Hist. Moll. vol. ii. 



p. 206. pi. xvi. f. 18, 19. 

 Hob. Central and Southern Europe. Central and Southern counties of 

 England and Ireland. North Africa. Madeira. (In gardens and 

 hedges.) 

 Helix rufescens has a shell of delicate texture roughly striated, 

 with traces, especially in the suture, of a fine pilous epidermis. As 

 the name implies, it is often red, a kind of rust-red, but the prevail- 

 ing colour is a dull pallid yellow, with an indistinct band round the 

 periphery. The animal is more variable, passing from yellow to 

 ash-brown, and even black, and it is sometimes striped. This species 

 is not uncommon in gardens and hedges in the central and southern 

 parts of England and Ireland, and ranges to Algeria and Madeira, 

 It is not found in the north of France, and Mr. Jeffreys gives, 

 Westmoreland as its northern limit in Britain. 



