HELIX. 139 



56. 23. Helix revelata. Green Snail. — Shell or- 



bicular, subglobose, thin, finely wrinkled, um- 

 bilicated, diaphanous, shining pale green, with a 

 few scattered hairs ; whorls convex, last largest ; 

 peristome thin. (t. 11. f. 133.) 



Helix revelata. Feruasac, Prod. 44. (?) ; Michel, Compl. 

 27. t. 15. f. 6, 7, 8. ; Forbes mid Hanloy, B. M. iv. 70. t. 119. 

 f. 1, 2, 3.; Benson, Ann. and Ma^. N. H. 1848, il. 359. 

 (not Bouchard). — Helix bndiella. Ziegler. — Helicella reve- 

 lata. Beck, hid. 7. — Helix subviridis. Bellamy, British 

 Assoc. 1841, South Devon. 



Inhabits shady places, among nettles. Devon, 

 Cornwall, Nottingham. 



Animal blackish. 



Shell thin, nearly transparent, green ; the mouth 

 large, roundish lunate, very oblique ; the umbilicus 

 rather narrow, only showing the penultimate whorl ; 

 the peristome is thin, and very slightly reflexed. 

 Most like H. fusca, but not so thin, and smooth, 

 green, and umbilicated. The hairs are brittle and 

 deciduous in the dry specimens. 



57. 24. Helix acvleata. Prickly Snail. — Shell 



conical, globose, brown horn-colour, with the 



suture deep ; the periostraca rising into thin 



spinous foliations ; aperture semielliptic. (t. 4. 



f. 33.) 



Helix spinulosa. LigUf. Phil. Trans. Ixxvi. 166. t. 2. f. 1—5.; 

 Montagu, p. 449. t. 11. f. 10.; Linn. Trans, viii. 201. — 

 Teba spinulosa. Leach, Mull. Syn. 72. — Helix aculeata. 

 Miiller, Verm. ii. 81.; Drap. p. 82. t. 7. f. 10, 11.; Alder, 

 Cat. 109.; Ross. Leon. viii. f. 536.; Forbes and Havley,B. M. 

 iv. 74. t. 1 17. f. 5, 6. — Helix delectabilis. Solander, MSS. 

 — Trochus terrestris, var. Da Costa, B. C. 36. (?) — Teba 

 Granatelli. Bivon, in Occhio, 1839, n. 9. f. 2. — Fruticola 

 aculeata. Held. Isis, 1837, 914. 



