SECTION I. 3 



than this given fox Shells,) are not naked, 

 but have every particular limb or part 

 feparatxly covered with the cruft, which 

 confequently is formed into many joints, 

 infomuch that the whole animal feem$ 

 as it were loricated, or in a coat of mail K 



All Teftaceous animals are formed of 

 two diftin£t parts : the one, which is the 

 animal, is foft or flefliy ; the other, whicli 

 is the Shell or habitation, is hard, of a 

 ftoney confidence, and covers the animal ; 

 to which it is conneded or attached by 

 mufcles. 



All Shell animals are exanguious, that 

 is, have no blood fimilar to that of qua- 



'' Some Authors have flrove to give definitions of 

 a Teftaceous and a Cruftaceous animal, but in vain, 

 or without any fixed or folid chara£lers. Sec Klein, 

 Nat. Difp. Echinodermatum, Se£l. i. Shells and 

 crufts of iifh have the fame nature and qualities, and 

 therefore, I think, no other definition can be made, 



B 2 drupeds. 



