UNIVALVES HELIX. 



95 



non-umbilicate, may be classed Nvitli the following spe- 

 cies, viz. Helix Pupa, Helix Barbara, Helix Amarula or 

 the Black Spiny Mitre from the Ganges, Helix Stagna- 

 lis, found in the still waters of Europe, and Helix Fragi- 

 lis, Palustris, &c. &c. &c. 



There are many of this genus which inhabit aquatic 

 plants in standing-waters, lakes, ponds, and ditches: 

 others are found on trees and shrubs of Asia, and in the 

 woods of Denmark, Sweden, and Germany ; some fre- 

 quent the water-falls of Lombardy ; many harbour among 

 rotten wood ; others again are the produce of America, 

 Africa, India, Italy, Portugal, Chhia, New Zealand, and 

 Otaheite; and many are found in Britain, and on its 

 coasts, though tbev are mostly minute. 



HELIX. 



