HELICID^E. 



407 



and in other localities the smaller species and young individuals of the 

 larger kinds are employed for feeding poultry. 



Fig. 196. Helix pomatia (Linnams). 



Certain species are also employed for feeding ducks. Thus, in the 

 neighbourhood of Montpelier, ducks are fed upon Helix variabilis and 

 H. rhodostoma. Some fishes, especially the young salmon, are very 

 partial to the flesh of snails. 



This very important genera is very numerous in species, which are 

 distributed in groups according to the form of the shell ; that is, whether 



Fig. 197. Helix Mackenzii 

 (Adams). 



Helix undulata 

 (Ferussac). 



Fig. 199. Helix translucida 

 (Linnaeus). 



it be globulous, as in Fig. 197, tun-bottomed, as in Fig. 198, plain or 

 biform, as in Fig. 199, or truncated, as in Figs. 200 and 201. These 

 figures will give the reader some idea of the multiplied and elegant 

 forms which the shells of Helix sometimes assume. 



