44 MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. TERRESTRIA. 



TrachMipodes Colimace's, Lamarck. Limacinea, in 

 part, Blainville. Geocochlides, Latreille. Genus H6lix 9 

 Linnaeus. 



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. Linnaeus. Lamarck. 



1 . Helix aspersa. Shell subglobose, imperf orate, ru- 

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

 tudinal bands of blackish-brown, interrupted by yellowish 

 curved spots. Aspersus, sprinkled with dots. 



2. Helix arbustdrum.- Shell subglobose, perforate, 

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

 having a longitudinal dark-brown band. Arbmtum, a 

 copse or orchard. 



3. Helix hortensis. Shell subglobose, imperf orate, 

 yellow, with five longitudinal brown bands, the mouth 

 with the margin white. Hdrtus, a garden. 



A. If. hortensis vulydris. Vulgaris, common. 



B. H. hortensis maritlma. Maritima, living near the sea. 



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



4. Helix caper at a. 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 atus, wrinkled like the horns of a 

 goat, caper. 



5. Helix hispida. Shell moderately depressed, very 

 thin, horny, pale yellowish-brow r n, covered with numerous 

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

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

 aperture with the margin thin. Hispidus, bristly. 



6. Helix Tr6chidus. Shell conico-convex, of six well- 

 rounded turns, faintly striate, transversely ; the base con- 

 vex with a shallow, undefined umbilicus. Tr6chulus, a 

 little "top wherewith children play." 



7. Helix lamellata. Shell conico-convex, of sjx 



