i6 C O N G H O L O G Y. 



Obfervations I'made by refpeftable and 

 learned naturalifls deferve particular at- 

 tention. I therefore allow with Mr, Adan- 

 fon, that the fame fort of fifli being found 

 in all the above Shells is a very pre- 

 fumptivc proof of their being of one 

 fame fpecies, though I cannot allow it 

 to be a pofitive or decifive one. I will 

 allow him, that the whole external ap- 

 pearance of the fifli and the particular 

 parts were nearly the fame ; yet I think 

 even that is not a pofitive proof. For I 

 imagine, the very fame kind of animal 

 inhabits different covers or Shells. As 

 for example, the Snails may be the fame 

 kind of fifli, and form the genus, yet 

 vary fo much in their habitations or Shells, 

 as to form different fpecies of that fame 

 genus, from only the differences of the 

 Shells or coverings : for the Shell, or 

 covering, may be held for as great a »}ia- 

 rafter of the fpecies, as the very fi(h. 

 Thus the Volutes called Admirals^ Bro- 

 cadesy Purple Tips or Ofiyxes, Tigers, &c. 



though 



