46 ANTHROPOID APES. 



slender than that of the animal just described ; the 

 head is round, the eyes are large, the nose projects 

 from its depressed surroundings with only a very 

 slight ridge, and the cartilaginous end is shaped like 

 a triangle with unequal sides. I'his triangular end 

 is divided by a longitudinal furrow, and the small 

 nostrils converge downwards and inwards, and are 

 divided from each other by a thin partition. The 

 structure of the upper lip is peculiar. In the 

 centre, just below the base of the nasal partition, it 

 is depressed, and divided into two symmetrical 

 lateral halves by a vertical furrow. Each of these 

 halves forms a rounded edge, overhanging the small 

 lower lip. Above the upper lips, between them and 

 the zygomatic arch, which slopes away below the 

 lower eyelids, there are the flat, depressed cheeks. 

 The small chin presents itself below the central cleft 

 of the upper lips and their convex rims. The face 

 of this gibbon, of which the general appearance is 

 very singular, is surrounded by a circle of thick 

 hair, which resembles the circular hood of an 

 Eskimo. This characteristic form of the head, both 

 generally and in detail, is not confined to the lar, 

 but applies to other species of gibbons, including 

 the siamang (see Figs. 11 and 15). It is a feature 

 which distinguishes the long-armed apes, almost at 

 the first glance, from the other forms of anthropoids 

 already described. The colour of the lar's face is 

 reddish brown or tawny ; the hair which surrounds it 

 is of a light grey : the body is of a dark grey, with 

 short, light grey hair on the backs of the hands and 

 feet. The black ears are almost hairless. The lar 



