326 



E. J. Anderson, 



segment originally it has a very important relationship to the perhaps 

 most important nerve centres of the adult Homo. If however we 

 compare the skull of the beaver (Castor) with that of Capybara, 

 the heavy skulled South American rodent has a parietal much shorter 



Fig. 17. 



Capybara. 



Fig. 18. 

 Castor fiber. 



than the frontal, whilst in the beaver, at the sides, it is enormously 

 longer, but in the frontal the greatest breadth in the beaver is in the 

 middle line, there is also a large inter parietal. The length of brain 

 cavity in Capybara is 9,5 cm. The following represents the series of 

 mammals measured. 



