ORANG CHIMPANZEE COJiki* 



NETCRO 



MONGOL WHITE 



OPLIOPITHECUSl 

 RAPITHECUS J 



FAYUM, EGYPT 



iLEOCENE 



INSECT IVOROUS 

 PRE-PRI MATE 



<.M(CRCCOR-M0O<riEO rooM uvk&rcconv cr. 



Fig. 28o. — Ancestral tree of the Anthropid Apes and Mankind, showing also 

 the bases of the branches leading to the tailed monkeys, to the primitive type, 



Tarsius, and to the lemurs. 



Owing to the incompleteness of the known fossil record certain parts of the tree are 

 necessarily tentative; for example, the separation of anthropoid and human families may 

 have occurred as late as Miocene or as early as Oligocene time. In Parapithecus, Pro- 

 pliopithecus, and the Heidelberg Race, only the lower jaws have been found; in Pithecan- 

 thropus only the skull cap, some teeth, a jaw fragment, and a femur. The skull of Aus- 

 tralopithecus is that of a juvenile type that would have had an adult state as shown, if we 

 may judge from the development of the skull in other anthropoids. The words Talgai, 

 Rhodesian, Boskop, and Brunn are names of other races of mankind, related to those figured 

 in the manner shown. 



(From a drawing by J. H. McGregor, based upon data modified from W. K. Gregory et al., 

 courtesy of J. H. McGregor.) 



529 



