MEMOIR OF LAMARCK. 



53 



S3 



I. Apathetic Animals. 



1. Infusoria. 



2. Polypes. 



3. Radiarii. 



4. Vermes. 

 (Epizoaires.) 



II. Sentient Animals. 



5. Insecta. 



6. Arachnides. 



7- Crustacea. 



8. Annelides. 



9. Cirrhipedes. 

 10. Mollusca. 



III. Intelligent Animals. 

 11. P^s. 



'S g-| 12. Reptilia, 



13. Jm. 



14. Mammiferw. 



The animals of the first primary division he de 

 fines as destitute of feeling, and moving only by 

 their excited irritability; and he assigns as their 

 character, the absence of a brain and of an elongate 

 medullary mass ; senses wanting ; forms various ; 

 articulations rarely existing. The animals of the 

 second division feel, but they obtain from their sen- 

 sations only perceptions of objects, a kind of simple 

 ideas which they are unable to combine with each 

 other in order to form complex ones. They possess 

 no vertebral column, but have a brain and most 

 frequently an elongate medullary mass ; some dis- 

 tinct senses; organs of motion attached under the 



