300 



THE INDUCTIONS OY CIOLOGY. 



But thougli Cuvier emancipated himself from tlio concep- 

 tion of a serial progression throngliont 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. 



INVEETEBEATA. 



Apathetic Animals. 



Do not feel, and move only by 

 their excited irritability. No brain, 

 not elongated medullary mass ; no 

 senses ; forms varied ; rarely articu- 

 lations. 



II. 



Cl. 



1. 



Infusoria. 



Cl. 



2. 



Polypi. 



Cl. 



3. 



Radiaria. 



Cl. 



4. 



TUNICATA. 



Cl. 



5. 



Vermes. 



Sen 



siTivE Animals. 



Cl. 



6. 



Insects. 



Cl. 



7. 



Arachnids. 



Cl. 



8. 



Crustacea. 



Cl. 



9. 



Annelids. 



Cj,. 



10. 



Cirripeds. 



Cl. 



11. 



CoNCIlirERA. 



Cl. 



12. 



Mollusks. 



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 brain 

 and mostly an elongated medullary 

 mass; some distinct senses; muscles 

 attached under the skin ; form sym- 

 metrical, the parts being in pairs. 



III. Intellige]st Animals 



Cl. 



13. 



Fishes. 



Cl. 



14. 



Reptiles. 



Cl. 



15. 



Birds. 



Cl. 



16. 



Mammalia 



VEETEBEATA. 



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 p^^^ts 

 beinc^ in pairs. 



