316 ESSAY ON CLASSIFICATION. 



a large number of his Sensitive animals are constructed 

 upon tlie same plan as many of those he includes among 

 the Apathetic. They embrace, moreover, two different 

 plans of structure, and animal psychology is certainly not 

 so far advanced as to afford the least foundation for the 

 distinctions here introduced. 



Even from his own point of view, his arrangement of 

 the classes is less perfect than he might have made it, as 

 the Annelids stand nearer to the Worms than the Insects, 

 and are very inferior to them. Having failed to perceive 

 the value of the idea of plan, and having substituted for 

 it that of a more or less complicated structure, Lamarck 

 unites, among his Apathetic animals, Radiates (the Polypi 

 and Radiaria) with Mollusks (the Tunicata) and with 

 Articulates (the Worms). Among the Sensitive animals, 

 he unites Articulates (the Insects, Arachnids, Crustacea, 

 Annelids, and Cirripeds) with Mollusks (the Conchifera, 

 and the Mollusks proper). Among the Intelligent ani- 

 mals, he includes the ancient four classes of Vertebrates, 

 the Fishes, Reptiles, Birds, and Mammalia. 



CLASSIFICATION OF DE BLAINVILLE. 1 



1. Sub-Kingdom. Artiomorpha or Artiozoaria. Form bilateral. 

 First Type : OSTEOZOARIA. (Vertebrata.) 

 Sub-Type : Vivipara. 



CL. 1. PILIFERA, or Mammifera. 1st. Monadelphya. 2nd. 



Didelphya. 

 Sub-Type: Ovipara. 



CL. 2. PENNIFERA, or Aves. 

 CL. 3. SQUAMIFERA, or Reptilia. 

 CL. 4. NUDIPELLIFERA, or Amphibia. 

 CL. 5. PINXIFERA, or Pisces. 



A nosteozoaria. 

 Second Type: ENTOMOZOARIA. (Articulata.) 



CL. 6. HEXAPODA. (Insecta proprie sic dicta.) 



1 De reorganisation des Animaux ; Paris, 1822, 1 vol. 8vo. 



