Our British Snails 



17 



ground-colours. Five is tlie normal number of 

 bands on the largest or bcdy-whorl, although 

 sometimes all run into one, and often one, some, 



eJLxsJ 



H. nemoralis at rest on hawthoi 



or all are wanting. Where only one band is 

 found — throughout the Helicidae — it is usually 

 that on the periphery or middle of the whorl, 

 and a shell in which this band is wanting, while 

 others are found, is a rarity. People are usually 

 astonished, on seeing a good series of the colour 



