300 



THE INDUCTIONS OF PIOLOGY. 



But though Cuvier emancipated himself from the concep- 

 tion of a serial progress/on throughout the Animal- King- 

 dom ; sundry of his contemporaries and successors remained 

 fettered by the old error. Less regardful of the differently- 

 co-ordinated sets of attributes displayed by the different sub- 

 kingdoms ; and swayed by the belief in a progressive develop- 

 ment, which was erroneously supposed to imply the possibility 

 of arranging animals in a linear series ; they persisted in 

 thrusting organic forms into a quite unnatural order. The 

 following classification of Lamarck illustrates this. 



INYEETEBBATA. 



I. Apathetic Animals. 



Cl. 1. Infusoria. 



Cl. 2. Polypi. 



Cl. 3. Badiaria. 



Cl. 4. Tunicata. 



Cl. 5. Vermes. 



II. Sensitive Animals. 



Cl. 6. Insects. 

 Cl. 7. Arachnids. 

 Cl. 8. Crustacea. 

 Cl. 9. Annelids. 

 Cl. 10. Cirripeds. 



Cl. 11. CONCHIFERA. 



Cl. 12. Mollusks. 



Do not feel, and move only by 

 their excited irritability. No brain, 

 not elongated medullary mass ; no 

 senses ; forms varied ; rarely articu- 

 lations. 



Feel, but obtain from their sensa- 

 tions only perceptions of objects, a 

 sort of simple ideas, which they are 

 unable to combine to obtain complex 

 !► ones. No vertebral column ; a braiu 

 and mostly an elongated medullary 

 mass; some distinct senses; mu. c cles 

 attached under the skin ; form sym- 

 metrical, the parts being in pahs. 



III. Intelligent Animals. 



Cl. 



13. 



Fishes. 



Cl. 



14. 



Reptiles. 



Cl. 



15. 



Birds. 



Cl. 



16. 



Mammalia 



YEBTEBBATA. 



!Feel; acquire preservable ideas; 

 perform with them operations by 

 which they obtain others ; are intel- 

 ligent in different degrees. A ver- 

 tebral column ; a brain and a spinal 

 marrow ; distinct senses ; the mus- 

 cles attached to the internal skele- 

 ton ; form symmetrical, the parts 

 being in pairs. 



