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ESSAY ON CLASSIFICATION.
a large number of bis Sensitive animals are constructedupon the same plan as many of those be includes amongtbe Apathetic. They embrace, moreover, two differentplans of structure, and animal psychology is certainly notso far advanced as to afford the least foundation for thedistinctions here introduced.
Even from his own point of view, his arrangement ofthe classes is less perfect than he might have made it, asthe Annelids stand nearer to the Worms than the Insects ,and are very inferior to them. Having failed to perceivethe value of the idea of plan, and having substituted forit that of a more or less complicated structure, Lamarck unites, among his Apathetic animals, Eadiates (the Polypiand Eadiaria) with Mollusks (the Tunicata ) and withArticulates (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 , Eeptiles, 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. Monadelpbya. 2nd.
Didelpbya.
Sub-Type: Ovipara.
Cl. 3. Sqttamifera, or Reptilia .
Cl. 4. Nudipellifera, or Amphibia .
A nosteozoaria.
Second Type: Emtomozoaria. (Articulata.)
Cl. 6. Hexapoda. (Insecta proprie sic dicta.)