REFERENCES AND QUOTATIONS. 323 



63 Origin of Species. I3th ed., p. 171. 



64 Lamarck also constructed a pedigree at the end of his " Philo- 

 sophic Zoologique," in which he disposes of the greater number 

 of classes, while he attributes to the remainder another point of 

 derivation. He thus assumes in the animal kingdom two primordial 

 forms derived from primordial generation. His scheme is as 

 follows : 



TABLEAU 



Servant a montrer 1'origine des differents animaux. 



Vers. Infusoires. 



Polypes. 

 Radiares. 



._.----" Insectes. 



Arachnides. 



Annelidas. Crustacees. 



Cirri pedes. 

 Mollusques. 



Poissons. 

 Reptiles. 



/ \ 



Oiseaux. 



: Mammales amphibiens. 



Monotremes. "... 



"'-.. M. cetacees. 



Mammales onguicules. : 



"" M. ongule's. 



A comparison of this pedigree with the one which we now set up 

 is extremely interesting, and shows the progress of our knowledge. 



22 



