53 



exactly square with four sharp angles, rounded 

 and hollow at the top like the socket of a joint. A 

 magnified figure may be seen in Lister's anatomical 

 tables at the end of his Conchology, 2.j%. 1. 

 The snail which inhabits this shell seems to be more 

 influenced by the weather than many of the smaller 

 sort ; for upon the first appearance of cold they 

 creep into crevices and under stones, clustering* 

 together and clinging to each other, as if they were 

 capable of communicating warmth by association. 

 They are the pest of gardens, especially such as 

 are inclosed by hedges and old walls. Upon many 

 of them are found a series of thin circular layers 

 placed horizontally : these are the laminar folia- 

 tions of the hibernal epiphragm left by another of 

 the species which had been attached to it. 



Too common every where. 



36. HELIX fusca. Shell depressed, wrinkled, trans- 

 parent, amber-colour, immaculate : aperture cres- 

 cent-shaped. 



Helix fusca. Mont. p. 424. t.lS.f.l. 

 Turt. Diet. p. 946. 



Shell three-eighths of an inch in diameter, and a 

 quarter of an inch high, very thin and pellucid, 



