130 
HELICID^. 
was used by Muller 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.) j 
[ 
Helix carthusiana. Muller^ Verm. 15., not Dr ap. ; Pfeiffer.^ 
Helix, i. 132. ; Forbes and Hanley, B. M. iv. 51. t. 116. f. 5, I 
6. — Helix carthusianella. Drap. 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. Boss. Icon. V\.t. — Teba carthusianella. Leach, \ 
Moll. Syn. 69. t. 8. f. 4 — 6. — Helix (Zenobia) bimarginata. 
Gray, Med. Bep. — Helix Gibbsii. Montagu, MSS, 
“ Leach, Brown, Brit. Shells, t. 40. f. 49. 51. — Helix nitida. 
Chem.n. C. Cab. ix. 103. t. 127. f. 1130, 1131. — Helix nemo- 
ralis d;d. Gmelin S. H. — Helix Gvpsii. Ferns. Jour, Phys. 
xc. 300. (for Gibbsii.) — Helix Olivieri var. y. Ferus. Prod, 
255. — Theba Charpentieri and Th. carthusianella. Bisso, 
Fur, M, iv. 76. — Monacha carthusianella. Fitz, Syst 95. 
