44 MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. TERRE8TRIA. 



TracMJipodes Colimach, Lamarck. Limachiea, in 

 part, Blainville. Geocochlides, Latreille. Genus Helix y 

 Linnoeus. 



Genus 1. Helix. — Shell orbicular, subglobose, subconi- 

 cal, or depressed, umbilicate, thin, spiral, with the aper- 

 ture roundish or semilunar, its margin thickened, and 

 more or less reflexed, but incomplete behind. Helix, a 

 snail. Linnseus. Lamarck. 



1. Helix aspersa. — Shell subglobose, imperforate, ru- 

 gose, and subreticulate, reddish-brown with four longi- 

 tudinal bands of blackish-brown, interrupted by yellowish 

 curved spots. Aspersus, spuinkled with dots. 



2. Helix arhustorum. — Shell subglobose, perforate, 

 faintly rugose, brown, marbled with brownish-yellow, and 

 having a longitudinal dark-brown band. Arhustum, a 

 copse or orchard. 



3. Helix hortensis. — Shell subglobose, imperforate, 

 yellow, with five longitudinal brown bands, the mouth 

 with, the margin white. Hortus, a garden. 



A. //. hortensis vulgaris. Vulgaris, common. 



B. H. hortensis maritima. Maritimo, living near the sea. 



C. H. hortensis arenicola. Arenicola, inhabiting sand, 



4 . Helix caperdta. — Shell moderately depressed, deeply 

 striate, of six convex turns, the last subcarinate, the um- 

 bilicus rather large, aperture semilunar with the margin 

 thin ; the colour yellowish-grey, irregularly spotted or 

 banded with brown above, the base with interrupted 

 brown bands. Caper dtus, wrinkled like the horns of a 

 goat, caper. 



5. Helix hispida. — Shell moderately depressed, very 

 thin, horny, pale yellowish-brown, covered with numerous 

 short glistening, yellowish-white hairs, th?last turn sub- 

 carinate, the keel paler, a rather narrow deep umbihcus, 

 aperture with the margin thin. Hispidus, bristly. 



6. Helix Truchdus. — Shell conico-convex, of six well- 

 rounded trn-ns, faintly striate, transversely ; the base con- 

 vex with a shallow, undefined umbilicus. Truchidus, a 

 little " top wherewith children play." 



7. Hi'lix lamelldta. — Shell conico-convex, of six 



