76 



HUMAN BIOLOGY 



to appear in the fossil record until the Oligocene, or second 

 great epoch of the Tertiary period, and so far as present 

 evidence indicates they were a distinctly later series than 



Fig. 13. Incomplete fossil skeleton of very primitive primate (Notharctus) 



from Eocene of Wyoming. 

 (After Gregory.) 



the early Eocene radiation of tree-shrews, lemuroids and 

 tarsioids. 



