412 THE INTERMEDIATE PRIMATES 



fellows. A long list of foods eaten by the hooloek has been given by the 

 numerous observers. This includes iruits, leaves, young shoots, spiders, 

 insects, birds' eggs and young birds. But much of this may be considered as 

 conjecture, although there is good reason to believe that the diet is extremely 

 varied. If captured young, the hooloek is readily tamed. It is gentle, well 

 disposed and good tempered. It shows a marked intelligence, particularly in 

 the acquisition of tricks and in adjusting itself to household regulation. 



Measurements and Indices of Hylobates Hoolock 

 The measurements of the hoolock show on the average: 



Body and head about 520 mm. 



Foot 150 mm. 



Skull 114 mm. 



Occipito-nasal length 99. Q mm. 



Interparietal width 49 mm. 



Breadth of brain case 61.5 mm. 



The dimensions of the brain including the cerebellum and brain stem are: 



Longitudinal diameter 65 .5 mm. 



Transverse diamc^ter jj mm. 



The brain is distinctly gyrencephalic in type, presenting, as do the brains 

 of all the other intermediate primates, a Sylvian, a Rolandic and a simian 

 fissure, which distinctly set the boundaries of the frontal, parietal, temporal 

 and occipital lobes upon the lateral convexity of the cerebral hemisphere. 



The weights of the several divisions of the brain are: 



Forebrain 54 gms. 



Midbrain 2 gms. 



Hindbrain 13 gms. 



Total weight of brain 69 gms. 



