68 HELIX. SNAIL-SHELL. 



thickened, often with, a kind of silvery cast, not the least 

 reflected: length usually an inch ; breadth five-eighths. 



Variety, with the lip white and somewhat expanded. 



Linn. Trans, viii. pi. 5. f. 8*- Dorset Cafc.pl/ 19. f. 30, 



Muddy places and ditches, v. v. 



59. Helix auricularia. Wide-mouthed Snail-shell. 

 Lister, pi. 123. f. 22 -Pennant, pi. 89. f. 4 Da Costa, 

 pi. 5. f. 17 Montagu, pi. 16. f. 2 Donovan, pi. 51. f. 1 

 17. 



Cat. pi. 21. f. 1 



Shell thin, brittle, semitransparent, rather conic and 

 obtuse, light yellow, often covered with a darkish of rust- 

 color skin : spires four, the first extremely large and co- 

 vering nearly the whole of the shell, a little -wrinkled lon- 

 gitudinally, and often marked with a single deep impres- 

 sion : aperture somewhat oval, vastly large ; the outer-lip 

 much expanded ; pillar-lip folded back and forming a slight 

 hollow behind it : length about an inch - 3 breadth three- 

 quarters of an inch. 



Stagnant waters, v. v. 



60. Helix limosa. 



. Montagu, pi. 16. f. 1 Brown, Wvm. Soc,$l. 24. f. 11. 



Shell thin, transparent, glossy, reddish-brown or horn- 

 color : spires four, the first very large. In appearance it 

 so much resembles the last, as to be considered a mere 

 var'ety, or the young shell : but it is of a more oblong and 

 tapering form, the first volution not so much swelling over 

 the next at the junction, the volutions all more prominent 

 and rounded, and deeply defined by the line of separation, 

 and the aperture is narrower. 



Ditches, and muddy places, v. v. 



61. Helix tentaculata. Coverlid Snail-shell. 



Lister, pi. 132. f. 32 Pennant, pi. 89. f. 6 Da Costa, 

 pi. 5. f. 12 Donovan, pi. 93 Dorset Cut. pi. 21. f. 12. 



The young shell. Walker, f. 33. 



Shell somewhat conic, rather obtuse, semitransparent, 

 yellowish- white, often covered with a dark skin, nearly 

 smooth: spires five or six, rounded and deeply divided, 

 flowed when alive with a strong concentrically stiiate lid : 



aperture 



