300 



THE INDUCTIONS OF BIOLOGY. 



But though Cuvier emancipated himself from the concop- 

 tion of a serial progression 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. 



L 



11. 



INVEETEBEATA. 

 Apathetic Animals. 



Do not feel, and move only by 

 tlieir excited irritability. No brain, 

 not elongated medullary mass ; no 

 senses ; forms varied ; rarely articu- 

 lations. 



Feel, bat obtain fronu their sensa- 

 tions only perceptions of objects, a 

 sort of simple ideas, which they are 

 unable to combine to obtain compleat 

 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. Intelligent Animals. 



VEETEBEATA. 



Peel; 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- 



J ton ; form symmetrical, the parts 

 beinff in pairs. 



