52 ANTHROPOID APES. 



colour is dun. The front of the throat, the breast, 

 and belly are of a lighter shade ; while the back of 

 the neck, the shoulders, upper arms, and thighs are 

 darker. A brown or black stripe runs down the 

 breast and belly from the armpits. The insides of 

 the hands and feet are black. The colour of young 

 specimens is more uniformly grey or dun. This 

 animal is found in Java and Sumatra. 



The hulock, otherwise called yulock or yoluck 

 {Hylobatcs Hoolocic, Harlan), has, in its adult con- 

 dition, a prognathous face with prominent sup a- 

 orbital arches, a long, low bridge to its nose, with high, 

 narrow nostrils, and a very small upper lip. In aged 

 animals there are two oblique folds over the eyes, 

 of a light grey colour. The rest of the hairy coat, 

 the face, hands, and feet are black, or, in the younger 

 animals, brownish black, with grey extremities, A 

 line of grey extends from the breast downwards over 

 the belly. This animal inhabits the mountainous 

 district of Assam. 



The unko (Hylohates Bafflesii, Is. Geoff. Saints 

 Hilaire.) is of a black colour, shading into reddish 

 brown on the back and sides. Hair, of a grey colour 

 in the male and white in the female, encircles the 

 face. This ape is a native of Sumatra. 



The dun-coloured gibbon {Hylohates entelloides. Is. 

 Geoff. Saint-Hilaire) is so called from its coat, which 

 is thick and woolly, and furnished with long hairs 

 of a greyish yellow or dun colour. This coat is 

 somewhat darker on the inner surface of the arms 

 and on the neck, where it shades into reddish 

 yellow. The growth of hair surrounding the face is 



