6 LAMARCK S ARRANGEMENT. 



which he has added a few genera of his own to those of 

 M. Lamarck, and has also arranged them in a different order. 

 But it will no doubt be thought by many that both Mr. 

 Parkinson and M. Lamarck have divided them too much, 

 making the genera more numerous than there is a necessity 

 for at present ; though several of their genera will scarcely be 

 objected to by any. 



M. Lamarck combines with the Linnaean order Testacea 

 several genera of the order Mollusc a, with which he consti- 

 tutes his First class of Animals without Vertebrae; this he calls 



Les MOLLUSQUES, Mollusca. 



The 2d, Les CRUSTACEES, - Crustacea. 



The 3d, Les ARACHNIDES, Spiders. 



The 4th, Les IN SECTES, - - Insects. 



The 5th, Les VERS, - - - Worms. 



The 6th, Les RADIAIRES, - Star-fish. 



And the 7th, Les POL yPJES, - - Polypi. 



The class MOLLUSCA he divides into two orders, the one 

 with heads, and the other without heads ; each of these he 

 divides into two sections, the one naked or without shells, and 

 the other covered or nearly enclosed with shells, as follow : 



