FAMILY COLIMACEA. 63 



3. Helix arbustorum. Tree Helix. 



Shell ; with a nearly covered umbilicus, depressly globose, rather 

 solid, livid-brown, freckled in a zigzag man- 

 ner with fawn-yellow and rust, mostly en- 

 circled at the periphery, with a dark linear 

 band, spire convex, moderately exserted, 

 whorls five and a half, densely obliquely 

 arcuately striated, strise puckered at the 

 sutures, interstices between them malleated 

 with crowded minute spiral impressed lines, 

 last whorl a little descending in front ; aper- 

 ture lunar-rounded, rather contracted, lip 

 sharply expandedly reflected, white, broadly 

 dilated over the umbilicus at its junction 

 with the body whorl. 



Helix arbustorum, Linnseus (1758), Syst. Nat. lOtli edit. p. 771. 



Helix Gothica, Linnseus (1758), Syst. Nat. 10th edit. p. 770. 



Cochlea unifasciata, Da Costa (1778), Test. Brit. p. 75. pi. xvii. f. 6. 



Helix turgidula, Wood (1828), Ind. Test. Suppl. pi. vii. f. 6. 



Arianta arbustorum, Leach (1831), Brit. Moll. p. 86. 



Helix Canigonensis, Boubee (1833), Bull. Hist. Nat. p. 36. 



Helix Xartartii, Farines (1834), Ann. Sc. Nat. vol. ii. p. 122. 



Helix Wittmanni, Zawadsky (1837), Rossm'dssler, Icon. Land und Sussw. 

 Moll, part 5. f. 279 d. 



Helix alpestris, Ziegler (1834), Rossmdssler, Icon. Land und Sussw. Moll. 

 part 5. f. 279 d. 



Cingulifera arbustorum, Held (1837), iies, p. 911. 



Helix planospira, Grras (1840), Desc. Moll, de VIsere, p. 36. pi. iii. f. 11. 



Helix (Arianta) arbustorum, Moquin-Tandon (1855), Hist. Moll. vol. ii. 

 p. 123. pi. xi. f. 1 to 4. 



Hab. Throughout Europe (in damp places in woods and gardens, or under 

 rocks). 

 Helix arbustorum is a granular livid leaden-blue or greenish snail, 



carrying a solid, globularly convoluted, dark brown shell, freckled 



in an irregular zigzag manner with fawn-yellow, often broken up 



into dots ; and the last whorl is mostly encircled at the periphery, 



with a sharply defined, linear dark band. The lip is always white, 



rather sharply expandedly reflected, and at its junction with the 



body whorl it is dilated over the umbilicus, so as nearly to conceal 



it from view. There is not much variation in the species. The 



most striking variety is one of a yellowish horn colour, in which 



the freckled reticulations are opake white. 



