PROBLEM 5. The Stages of Man's Developjnent on the Earth 



567 



Flu. 515 (right) Frof. J. H. 

 McGregor has painstakingly 

 iiiodeled these heads of Java 

 and the more recent Nean- 

 dertal man, using the few 

 bones that are available. 

 H01V did these anciejit men 

 differ in structure? (Amer- 

 ican MUSEUM OF NATURAL 



history) 



L 



Fig. 516 (above) Shdl of F eking man. Note 

 the heavy eye ridges and lack of chin, (rocke- 

 feller foundation) 



Fig. 517 (right) Excavating for F eking man 

 near Feiping (Feking), China. Why are the 

 squares drawn on the side? (roc:kefei.i.er foun- 

 dation) 



