LAND SNAILS AND UMBRELLA SHELL 



, 2 Helix Pomalia, the prin- 

 cipal edible snail in Europe. 



3, 4 Pyramiduia solitaria. 

 5 Omphalina fuUginosa . 



Gastrodonta ligera. 

 Polygyra albotabris. 



Pyramiduia alternata. 

 Umbrella Indica. 



