CHAPTER XXL 



THE EXTEENAL CONFIGURATION OF THE HUMAN BRAIN. 



The Brain of Man belongs to the same type or pattern as 

 that met with among Apes and Monkeys. Whatever in- 

 terpretation may be put upon it, this fact itself is too 

 obvious to admit of any doubt. The same general shape 

 is to be seen, the same lobes, the same principal fissures. 



It is true that important differences are also en- 

 countered. The relative size and development of the 

 several Lobes is not the same. There is again in the 

 brain of Man a much greater richness and complicacy of 

 the ' secondary ' fissures and Convolutions ; whilst a 

 difference eclipsing all others in importance is to be found 

 on the side of weight. The maximum Brain-weights that 

 have, as yet, been encountered among the great * man- 

 like ' Apes, range from 12-16 oz., although the body- 

 weight of some of these creatures equals or may even 

 greatly exceed that of an ordinary Man. 



Striking, however, as the difference is, between the 

 brain-weights of the great * man-like ' Apes and those of 

 ordinary human beings, it must not be forgotten that the 

 actual range of variation met with among individual Men 

 is still greater. Some persons may exhibit distinctly 

 human attributes and mental powers, though possessing 

 brains which do not exceed 32 oz. in weight, whilst the 

 same organ in other Men may rise to a maximum of 

 64-67 oz. Such facts, together with others already cited. 



