.til 



PACK 



6. Of some species of plants, whose form differs 



greatly from that of those most known to us 68 



7. Of plants in general - - ib. 



8. A view of the exterior parts of plants - 69 



9. A view of the inside of pjants 71 



10. Transition from vegetables to animals : the sen- 



sitive plant and the polypus - 73 



11. Reflections on animal machines 75 



12. Reflections on the polypus . ib. 



13. Of worms that may be multiplied by slips 76 



14. Of insects in general - 77 



15. Tfce external parts of insects - 78 



16. The inside of insects - * 80 



17. Passage from insects to shell-fish : pipe-worms ib. 

 13. Of shell-fish - 81 



19. Passage from shell-fish to reptiles, and of reptiles 



to fishes - 83 



20. Of fishes - - ib. 



21. Passage from fishes to birds : the flying-fish ; water- 



birds ; amphibious birds 84 



22. Passage from birds to quadrupeds : the bat ; flying- 



squirrel ; the ostrich, &c. - 85 



CHAP. IV. 



Continuation of the gradual Progression of Beings. 



1. Of animals, considered as mixed beings. Superi- 

 ority which the faculty of reeling gives the ani- 

 ma) over the plant . .87 



