HELICID^. 125 



deposits its eggs, the head and tentacles are drawn 

 in. See fig. a. b. c., from Mag. Nat. Hist. vii. 226. f. 

 39., exhibiting the animal in its different positions. 



In winter, they bury themselves from one to two 

 feet deep in the earth, and are most above the surface 

 from August to November. They chiefly live on 

 worms, and sometimes will attack slugs and smaller 

 specimens of their own species ; shells of their own 

 kind being sometimes found in their stomach. 



The Testacella scutulum of Sowerby is a very slight 

 variety of the common species. 



D. Mantle thin, enclosed in the shell ; body granular, 

 without any grooves; lips short, rounded. (He- 

 licina.) 



4. HELIX. (Snail.) 



The animal moderate, with an elongate depressed 



foot, and a large, produced, central, spiral body, 



covered with a subglobose or depressed shell, with 



a lunate mouth, which is generally broader than 



long, strengthened with an internal thickened rib, 



and more or less reflexed edges : tentacles four, 



the two lower small, club-shaped. 



These animals have a distinct and very variously 



divided vesicula multifida, which is wanting in Succinea, 



Bulimus, and other allied genera. 



The young shells have the outer whorles generally 

 more or less keeled, and the axis is always umbi- 

 licated or perforated, but the perforation is sometimes 

 masked by the reflexion of the outer lip of the adult 

 shell over it. 



This genus is known from Zonites by the thick- 

 ening of the outer lip ; from Vitrina by the axis being 

 G 3 



