UNIVALVE MOLLUSCA. 



425 



Besides Helix pomatia, according to ^Moquin-Tandon, they eat in 

 the north of France Helix sylvatica and H. nemoralis ; at MontpeUier, 

 as we have already said, H. aspersa and H. rhodostoma ; at Avignon, 

 also, these, along with H. vermicuiata, are favourites. In Provence, 



Fig. 196. — Helix Mackenzii 

 (Adams). 



Fig. 197. — Helix undulata 

 (Ferussac). 



Fig. 198.— Helix translucida 

 (Linnaeu-s). 



Helex pisajia, with H. aspersa and melastoma, are preferred, At Boni- 

 facio, Helix aspersa, H. vermiculata, and, more rarely, H. rhodostoma ; 

 and in other localities the smaller species and young individuals of 

 the larger kinds are employed for feeding poultry. 



!• igs. 199 and 200. — Hcli.x Waltoni (Reeve). 



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

 the neighbourhood of MontpeUier, ducks are fed upon Helix variabilis 

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

 very partial to the flesh of snails. 



This important genus is very numerous in species, which are 

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



