i88 C O N C H O L O G Yo 



them as Cochlea?, and Linnsus places them 

 in a genus he calls Helix. " 



I define the Auris Cochleae, or Ear 

 Snails, as follows. Shells fo wide and open 

 as to refemble Sea Ears, but are not per- 

 forated or fet with a row of holes. They 

 have a broad ledge along one fide, which 

 projefls over the cavity, and turbinates 

 into one fingle flat fpire, quite even or 

 level with the bottom of the Shell. This 

 fpire is alfo very wide, and extends to near 

 the middle of the bottom or under part : 

 ib that this family abfolutely participates 

 of the characters and fliapes of the Sea Ears, 

 and of the Snails, and is, as it were, a com- 

 bination of thofe two families, as alfo 

 one of the innumerable inftanccs of the 

 infenfible progreflions nature takes from 

 one family to another ; which progreffions 

 baffle human powers to limit, or the re- 

 fined definitions of the moft accurate na* 

 turalifts. 



There 



