THE EXTERNAL FORM OF ANTHROPOID APES. 47 



has up to this time seldom found a place in our 

 zoological collections. It is found in Malacca and 

 Siam. 



The white-handed gibbon (Hylohates alhimanus, 

 Vigors and Horsfield) is often confounded with H. 

 Lar. But H. alhimanus has a black face, and the 

 general colour of the skin is black, including the 

 inside of the hands and feet. Thick white hair 

 encircles the face, and the backs of the hands and 



Fig. 10.— Head of the white-handed gibbon. 



feet are covered with short white or light grey- 

 hairs, while the rest of the coat is quite black. The 

 hair of the forearm grows downwards, towards the 

 wrist. The ears of these apes are almost of the shape 

 of an equilateral triangle. The helix of the ear runs 

 like a flap round its free outer edge. The anti-helix 

 passes through the centre of the slightly depressed 

 external surface of the ear, of which the whole 

 arrangement does not essentially diifer from that of 



