130 HELICID.E. 



was used by Miiller for another species, for which it 

 should be retained. 



Helix cantiana has been supposed to be almost 

 confined to the four metropolitan counties, but it is 

 also found in Suffolk, near Bristol, and near Dublin. 

 It may have been introduced in these latter localities ; 

 for it has been within these few years, according to 

 Mr. Fryer, introduced with ballast by the colliers on 

 the banks of the Tyne, and is now rapidly spreading 

 itself in the hedges of that neighbourhood. These 

 circumstances would lead one to imagine that it 

 might also have been introduced into England from 

 the Continent ; but Ferussac, who has compared it 

 with the continental species, regards it at least as a 

 local variety of H. carthusiana of Draparnaud (not 

 of MUller), which is a native of the south of France 

 and Italy. 



48. 15. HELIX carthusiana. Gibbs's Snail. Shell 

 depressed, semitransparent, bald, rather shining, 

 grey, with a milk-white band across the aperture 

 externally ; umbilicus minute, (t 3. f. 27.) 



Helix carthusiana. Mutter, Verm. 15., not Drop. ; Pfeiffer, 

 Helix, i. 132. ; Forbes and Hanley, B. M. iv. 51. t. 116/f. 5, 

 6. Helix carthusianella. Drop. p. 101. t. 6. f. 31, 32. 

 and t. 7. f. 3, 4. ; Brard, p. 24. t. 1. f. 7. ; Turt. Man. ed. 1. 

 f. 27. Ross. Icon. vi. f. 366. Teba carthusianella. Leach, 

 Moll. Syn. 69. t. 8. f. 4 6. Helix (Zenobia) bimarginata. 

 Gray, Med. Rep. 1821. Helix Gibbsii. Montagu, MSS. 

 " Leach," Brown, Brit. Shells, t. 40. f. 49. 51. Helix nitida. 

 Chemn. C. Cab. ix. 103. t. 127. f. 1130, 1131. Helix nemo- 

 ralis 3^. Gmelin S. N. Helix Gvpsii. Ferus. Jour. Phys. 

 xc. 300. (for Gibbsii.) Helix Olivieri var. y. Ferus. Prod. 

 255. Theba Charpentieri and Th. carthusianella. Risso, 

 Eur. M. iv. 76. Monacha carthusianella. Fitz. Syst. 95. 



