FIG. IA. SKULL OF NEANDERTAL MAN 



From La Chapelle-aux-Saints. Restored by McGregor. 



R, portion restored. 



FIG. IB. SKULL OF CRO-MAGNON MAN 

 From Grotte des Enfants. After Verneau. 



Reproduced by courtesy of Doctors J. H. McGregor and \V. K. Gregory, 

 of the American Museum of Natural History. 



