42 Our British Snails 



tiger and the zebra, and renders the shell less 

 visible. 



Helix (Cepcsa) Jiortensis. — Rarely found in 

 gardens in spite of its specific name. A hedge- 

 snail. White forms not uncommon, though al- 

 most unknown in nemoralis. Though the weaker 

 form, the coalescence of the five bands into one 

 broad one is more common here than in nemoralis. 

 Also the variety with only one band, and that 

 on the periphery, is very common in nemoralis 

 and rare in hortensis. It is more dependent on 

 shade and moisture than its congener. Smells 

 of garlic when immersed in boiling water to be 

 killed. Hortensis is a more northern, and nemo- 

 ralis a more southern, shell by origin and distri- 

 bution. There are 89 possible band variations 

 in any normally five-banded shell, and all have 

 been noted in the case of nemoralis, but in hor- 

 tensis only 61. They are distinguished, for 

 purposes of record and exchange, by numbers. 

 Thus the type is 12345, the usual one-banded 

 variety 00300, the common coalescence of the 

 second and third band is 12345, and when all 

 bands unite 2^345- The unicolourous or bandless 

 variations would be 00000. 



H. (Arianta) arbustorum. — Local. Usually 

 found in hedges and by ditches on chalk and 

 limestone. Shell globose, brown or yellow, with 

 a check or willow leaf pattern, and a single dark 

 band on the periphery. Lip strong and white. 



