EVIDENCES FROM PALAEONTOLOGY 



75 



D 



JF22r 



B 



JZ IT 



JF M 



Fig. 4. — Four stages in the evolution of the cameline fore foot. A , Proiylopus, 

 Upper Eocene; B, Poehrotherium, Lower Oligocene; C, Procatnelus, Upper Miocene; 

 D, guanaco, Recent. {From Scott.) 



