i 3 8 



EVOLUTION, GENETICS, AND EUGENICS 



&& 



JET 



JK 



JD? M 



Fig. 33. — Four stages in the evolution of the cameline fore foot. A , Protylopus, 

 Upper Eocene; B, Po'ebrotherium, Lower Oligocene; C, Procamelus, Upper Miocene; 

 D. guanaco, Recent. (From Scott.) 



