i66 



CHORD ATE ANATOMY 



AUSTRALOPITHECUS 



SINANTHROPUS 



CRO-MAGNON 



E. '^ f 



Fig. 158. — Skulls of fossil men restored, left lateral aspect. Australopithecus, how- 

 ever, as its name implies, is an ape rather than a man. Opinions differ as to whether 

 Pithecanthropus is man or ape. Sinanthropus is indisputably human. While none of 

 these fossil types is believed to be in the direct line of ancestry of modern man (Homo 

 sapiens), their discovery proves that more than one .species of man has inhabited the 

 earth. It is also significant that, with the exception of Cro-Magnon man, the earlier 

 species of men were more ape-like than is modern man, as would be expected if apes and 

 men have had a common ancestry. (Redrawn after Romer's "Man and the Verte- 

 brates," University of Chicago Press.) 



