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



the juftly celebrated Linni£us, who places 

 at the head of the definition of each genus 

 of Shell the genus of animal, which, ac- 

 cording to his fyftem, inhabits them : 

 however, ail thefe defcriptions of the ani.- 

 mals have never yet been colleded to- 

 gether, and methodically digefted. 



This naturally leads me to the difcuft 

 fion of a fubjefl: of great debate among 

 Naturalifts, which is, whether the metho- 

 liical fyftem or arrangement of teftaceous 

 Animals (hould be formed from the Ani- 

 mals themfelyes, or from their habitations; 

 or Shells. The former method feems 

 moft fcientifical ; but the latter, from the 

 Shells, is univerfally followed, for many 

 reafons. 



Ant. de Heyde M. D. Aiiift. Anatome Mytuli. 

 Amllelod. 1684, 12"^°. %. 



Rouflet, Obfervations fur lesVers de Me r qui per- 

 cent ks Vaiffeaux, kc. La Haye, 1733, ^^°* ^S* 



Swammerdam, Biblia Naturae, Leydae, folio. 2 vols. 



H" 



The 



