EVIDENCES FROM PALAEONTOLOGY 



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IT JH 



JF M 



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

 Upper Eocene; B, Poehrothcrium, Lower Eocene; C, Procamelus, Upper JMiocene; 

 Z), guanaco, Recent. {From Scott.) 



