144 Instinct and Intelligence 



this animal's body being about the same as 

 that of an average adult human being; this 

 great difference in the capacity of a human and 

 a gorilla's skull represents the difference that 

 exists between the size of their brains. 1 (Fig. 



15.) 



Although it is impossible to ascertain the 

 exact form of the brain possessed by Tertiary 

 human beings, the brains of a certain class of 

 idiots are of such a size and form as would fit 

 well into the Java skull-cap. We published 

 some years ago a case of this kind, in order to 

 show what the probable habits and behaviour 

 of primitive human beings would have been, 

 possessing, as we may presume was the case, 

 brains having about the same superficial area 

 and configuration as the class of idiots to which 

 we refer. 2 



In the case which came under our notice the 

 individual was four feet eight and a half inches 

 in height, and broad in proportion to his stature ; 



1 Prof. T. H. Huxley, Evidence of Man's Place in Nature, 

 p. 136. See also The Origin and Character of the British People, 

 by N. C. Macnamara, p. 28. 



2 Journal of Anatomy and Physiology, January, 1903, Vol. 

 XXXVIII., p. 258. See also Scientific Transactions of the Royal 

 Dublin Society, Vol. V., Series II.; "The Brain of Microcephalic 

 Idiots," by Prof. D. J. Cunningham. 



