HELIX. SNAIL-SHELL. 61 



Variety, dull yellowish-brown, of a more oval form, and 

 without bands. 



Before the lip is fully formed, the shell is very light and 

 brittle^ with the margin extremely thin and membrana- 

 ceous, not protruding in front, but perfectly crescent- 

 shaped, and without any appearance of the white edge ; 

 and there is generally a deep perforation behind the pillar- 

 lip, which gradually closes as the shell arrives at matu- 

 rity. 



A variety was found by Dr. Latham, at Dartford, with 

 the spires reversed ; and another by Mr. Swainson, with 

 the volutions much extended and detached from each other, 

 like the worm of a corkscrew. 



Common in gardens and hedges, v. v. 



42. Helix fusca< Brown Snail-shell. 



Montagu, pi. 13. f. 1. 



Shell thin, transparent, rufous horn-color, very faintly 

 wrinkled, with five or six rather raised and well denned 

 volutions ; the first very large : aperture crescent-shaped ; 

 the lip thin and reflected a little at the lower margin only, 

 where it forms a small depression or incipient perforation : 

 diameter three eighths of an inch, and hardly a quarter of 

 an inch high. 



Variety, clear white, transparent, and highly polished. 

 The neighbourhood of London; woods in Dublin; and 

 the variety from Scotland, v. v. 



43. Helix variegata. Linn. Trans, iii. p. 67- 



Shell semitransrjarent, smooth, with red lires : spires 

 four, the first more tumid : margrn of the aperture very 

 much spread. 



Pembrokeshire : minute. 



D. Shell tapering tea point. 44 to 51. 



44. Helix disjuncta. Disjointed Snail-shell &g. 63. 

 Helix elegans. Brown, Wern. Soc. pi. 24. f. 9. 



Shell transparent, with seven much rounded voltftions, 

 loosely set together, but very deeply divided so fts to ap- 

 pear almost detached from each other, slightly striate <# 

 G wrinkled 



