SOUTH DAKOTA SCHOOL OF MINES 



137 



EVOLUTION OF THE CAMELS 



s 





Pleistocene 



Recent 



Auchenla 

 (Llama) 



Skull 



Feet 



Teeth 



Pliocene 



Procamelus 



< 



Miocene 



Poebrotherium 



Ohgocene 



Protylopus 



Eocene 



Mesozoic or Age of Reptiles 



Hypothetical five-toed Ancestor 



Figure 71 — The evolution of the camel as indicated by the skull, feet 

 and teeth. (Modified from Scott) R. S. Lull: Organic Evolution, 

 1817. Published by The Macmillan Company. Reprinted by 

 permission. 



