THE ANTIQUITY OF MAN 15 



define Pithecanthropus as an early side branch of the Homini- 

 dae, which had already been driven southward away from 

 the primitive center of dispersal in Central Asia, by pressure 

 of higher races. But whatever its more precise systematic 

 and phylogenetic position, Pithecanthropus, or even its con- 

 stituent parts, the skull-top, the femur and the molars, sever- 

 ally and collectively testify to the close relationship of the late 

 Tertiary anthropoids with the Pleistocene Hominidae. 



Fig. 3. Pithecanthropus erectus. Skull and face. Adapted from McGregor. 

 Portion beneath irregular line restored. Two fifths natural size. 



Of restorations of Pithecanthropus, several have been at- 

 tempted. The skull completion here shown ( Fig. 3 ) is derived 

 from the studies of Dubois and McGregor. The latter has 



