PLEISTOCENE OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 381 



Human culture stages. — Our review of the time divisions of the Quater- 

 nary naturally closes with that of the human culture periods, which are 

 most clearly presented in the accompanying table by de Mortillet,^ and 

 below will be found brief outlines of the history of PalsBolithic man and 

 the appearance of man in North America (p. 494). 



G. DE MORTILLET'S CLASSIFICATION OF 1898-1908, BASED ON THE EVOLU- 

 TION OF HUMAN IMPLEMENTS 2 



The Eolithic Stage. ^ — The rude flints known as eoliths, which precede 

 the earliest palseoliths of the Chellean Stage, have been the subject of much 



' De Mortillet, A., La Classification Palethnologique. Paris, 1908. 



2 From A. de Mortillet's La Classificatio-n Palethnologique, Paris, 1898-1908. This 

 classification is that of the elder de Mortillet, and it is considerably modified by more recent 

 discoveries. 



3 MacCurdy, G. G., The Eolithic Problem, Evidences of a Rude Industry Antedating 

 the Paleolithic. Amer. Anthrop., Vol. VII, no. 3, July-Sept., 1905, pp. 425-479. 



