TRANS. AM. PHILOS. SOC, N. S. XXI. 



PLATE XIV. 



G F. TRAIN 



CHIMPANZEE 



SEMNO- 

 PITHECUS 



MARMOSET LEMUR MVCETES 



Fig. 3. Brains of Primates arranged in phyletic series. 



A. J. PARKER 



PITHECAN- 

 THROPUS 

 'hypothetical) 



Fig. 4. The brain of a Papuan and the hypothetical contour of tlie 

 brain of Pithecanthropus (drawn into tlie cranial outline) interposed be- 

 tween the brain of a highly intellectual person and that of a gorilla. 



