HELIX. SNML-SHELL. 69 



aperture roundish oval ; the outer-lip rather strong ; inner- 

 lip reflected and forming a slight groove behind it : length 

 half an inuh ; breadth a quarter. 

 Ponds and stagnant waters, v. v. 



62. Helix lutea. Yellow Snail-shell 

 Montagu, pi. 16. f. 6. 



Shell somewhat oval, semitrans parent, strong, smooth, 

 dull orange-yellow, obtuse at the point : spires three, the 

 first very large : aperture oval, very wide ; the outer-lip 

 rather thick ; inner-lip a little thickened, but not reflected 

 or forming a hollow. It much resembles H. succinea, but 

 is less, not so tumid, thicker and stronger, and an inhabi- 

 tant of the ocean : length nearly half an inch ; breadth al- 

 most a quarter. 



Sea coasts of South Devon, v. w, 



63. Helix glutinosa. Glutinous Snail-shell. 

 Montagu, pi. 16. f. 5. 



Shell nearly orbicular, transparent, extremely thin and 

 brittle, and finely glossed, smooth or very faintly wrinkled, 

 often covered with a glutinous skin : spires three, the body- 

 one vastly large, occupying almost the whole of the shell, 

 so as nearly to conceal the rest when it is lying with its 

 mouth upwards : aperture oval, extremely large, reaching 

 almost to the very tip , the inner-lip not reflected nor 

 forming any kind of cavity : length more than half an inch ; 

 breadth three eighths. 



In quite still waters, v. v. 



64. Helix Isevigata. Ventricose Snail-shell. 

 Pennant, pi. 89. f. 8 Donovan, pi. 105 Dorset Cat. 



pi. 18. f. 9. 



Shell nearly orbicular, very thin and brittle, transparent, 

 veiy obtuse, faintly but regularly striate longitudinally, 

 often covered with a brownish wrinkled skin, under which 

 it is pale flesh-color : spires four, the first very la: ge and 

 wide, the others minute, obtuse, and placed nearly flat on 

 the larger volution ; inside light purplish-brown or whitish : 

 aperture nearly orbicular, vastly extended ; the margin 

 thin, not reflected at the pillar nor forming a cavity : length 

 half an inch or more ; breadth something less. 



Variety^ 



