68 



SOCIAL EVOLUTION 



From "L' Antliropolofric. 



FrruTiF 24. Eolithic Iniplemonts. 



of chimpanzee. Most authorities agree on the latter. This 

 decision means that the Piltdown man is not as ancient as 

 was first supposed but lived in the third interglacial time. 

 Other skulls and bone parts of prehistoric man have 

 been found and are preserved in museums, but the speci- 

 mens described are sufficient to illustrate the type of 

 evidence they constitute. The available materials for the 

 study of prehistoric man, besides his own remains, are his 



"""Osborn, H. F.,—Mc7} of the Old Stone Age, 2nd ed., 1916, p. 512. 



