128 HELICIDiE. 



broad, the peristome very thin and not reflected ; 

 umbilicus very large, and so open and deep as to 

 expose three or four of the volutions. 



This shell varies greatly in colour, being often 

 distinctly banded, and at other times quite bandless, 

 when it is H. obliterata of Hartmann. The bands 

 vary in number, those on the front of the whorls 

 being most generally present. It also varies very 

 much in size, being sometimes an inch in diameter 

 (see Pfeiffer, t. 2. f. 24, 25.), and at others not one 

 third of that size {Pfeiffer, t. 2. f. 23.), when full 

 grown ; the smaller shells are always rather thicker. 

 It is always known from //. cespitum of Draparn. 

 by the spire being lower and the umbilicus wider. 

 Mr. Jeffreys speaks of one with a more produced 

 spire found in lona, "Western Islands {lAnn. Trans. 

 xiii. 339.); but I have not seen any that agree with 

 Draparnaud's species. 



h. Shell depressed, perforated or umhilicated, horn- 

 coloured or brown, nearly one-coloured ; peristome 

 slightly thickened, rather spread ; periostraca 

 pale, often bristly, especially in the young ; bristles 

 deciduous. Jaw broad, costated in front, and 

 toothed on the edges. (Hygromanes Ferussac.) 



47. 14. Helix cantiana. Kentish Snail. — Shell 

 slightly depressed, subglobose, brittle, semi- 

 transparent, pale rosy, with an obscure paler 

 band ; region of the aperture rufous-brown ; 

 umbilicus small, (t. 3. f. 26.) 



Helix cantiana. Montagu, p. 422. t. 23. f. 1. 1803; Malo7i and 

 Racket, Linn. Trans, viii. 197.; Fer.rrod. 43.; Forbes and 



