INTRODUCTION. 45 



itself during the cold weather, as the tropical 

 species do during the dry season. 

 Arion antiquorum, 

 Limax maximus, 



agrestis. 



Helix hortensis, 



hybrida, 



nemoralis, 



fusca, 



Cantiana, 



live in hedges and banks, walking about in the dew, or 

 after rains. 

 Helix virgata, 



caperatd) 



ericetorum^ 



Pisana, 



Carthusiana, 



Bulimus acutusy 



are found, after dry weather, sticking to the dry 

 stunted vegetation on heaths. They go down to the 

 root, and come out again after the summer rains ; and 

 are so abundant that they are vulgarly believed to 

 have come down from the clouds with the rain. 



The Helix rupestris is found between the brick or 

 stone at the tops of walls, and in the earth in the 

 higher parts of rock. 

 Pupa marginata^ 

 Achatina acicula, *c. 

 are found in the moss at the roots of grass, &c. 



The Helix arbusforum, in wet shady situations near 

 a black boggy soil, on the margin of ditches or 

 rivers. 



Bulimus obscuniS) 



