HELICIDJE. 147 



in 1820; in 1821 I again noticed it in the Medical 

 Repository, under the name of H. bimarginata. 



Mr. Jeffreys thinks it probable that this species had 

 been introduced from France (Linn, Trans, 509.), 

 but I have seen it quite as common as H. virgata for 

 many miles of the south coast of England, from Dover 

 to Brighton ; and it must have been introduced some 

 years ago, as it was discovered by Mr. Gibbs in 

 1814. 



Mr. Jeffreys considers his H. nifilabris Var. a to 

 be H. Olivieri of Ferussac, but this must be a mistake ; 

 for the latter is quite a distinct species, and not found 

 in England. It is imperforated : there are specimens 

 of it in the Museum collection. 



31. 13. Helix /wsra. Brown Snail, (t. 4. f. 36.) Shell 

 subglobose, wrinkled, transparent, very brittle, 

 rather flexible, amber-coloured, bald; aperture 

 lunate; umbilicus very narrow ; peristome thin. 



Helix fusca. Mont. p. 424. t. 13. f. 1. ; Turt. Diet. 

 p. 946., Man. f. 36. ; Jeffreys, Linn. Trans, xvi. 

 321.391.507.; Alder, Mag. Z. Sf B. ii. 107. 



Helix subrufescens. Miller, Ann. Phil. 



Zenobia corrugata. Gray, Med. Rep. 1821. 



239. 



Inhab. damp woods among decayed leaves and 

 thick herbage. 



Animal yellowish ; tentacles long. 



Shell three-eighths of an inch in dia- 

 meter, and a quarter of an inch high, very 

 thin and pellucid, more or less wrinkled, 

 glossy amber-coloured; aperture crescent- 

 shaped, very thin, as long as broad, reflected 

 h2 



