THE SIZE OF BRAINS 

 It seems that a small brain may serve very well 

 to guide the great animal machine in established 

 ways, but in order to learn new things in its 

 own lifetime an animal must have a big brain- 

 indeed, a very big brain. And the kind of animal 

 which can learn— that is to say, can be educated 

 —will, in the long run, beat the kind which has 

 too small a brain to be capable of learning. 

 This is the significance, not only of the big 

 brains of recent rhinoceros and horse as com- 

 pared with those of Titanotherium and Dino- 

 ceras, but it is also the significance of the big 

 brain of man, which is far bigger than that of 

 any other animal in proportion to the bulk of 

 his body and Hmbs. 



Another huge horned animal has quite lately 

 become known which in some ways resembles 

 Titanotherium and Dinoceras, but has to be 

 kept apart from them on account of being really 

 unHke them in its teeth and skull and feet-bones, 

 although having a general resemblance to them 

 in outHne and bulk. This creature was found 

 only three years ago in the same Upper Eocene 

 sands of the Egyptian Eayum from which Dr. 

 Andrews obtained the ancestors of elephants. 

 The skull of this most strange animal is shown 



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