48 ANTHROPOID APES. 



the ear of other anthropoids. The cartilaginous sub- 

 stance of the organ is a good deal inflected, broad 

 behind and in the upper part, dividing into two 

 limbs in front and below. There are indications 



of the tragus and anti- 

 tragus. The detached 

 lobule of the ear is 

 absent (Fig. 11). This 

 structure of the external 

 ear is common to other 

 species of gibbons, al- 

 though in many cases 

 the upper part of the 



Fig. 11.— Ear of the white-handed gibbon, helix is wrinkled, and 



the anti-helix is some- 

 times more fully developed, and more like that of 

 the human ear. 



The face in this species is small. The supra-orbital 

 aiches ai-e strongly developed, and almost join in the 

 centre. The eyes are large, dark, and have a mild 

 and placid expression. The cheeks are prominent 

 in the region of the zygomatic arch, and depressed 

 below it. The bridge of the nose is imbedded 

 between the cheeks, which, especially when seen in 

 profile, take a slightly conical form. The nose is 

 covered with cross-folds. Its cartilage is of the shape 

 described in the former species, and so are the 

 upper lip and chin (Fig. 10). Long, bristly hairs 

 stand out on the supra-orbital arches and upper lip, 

 and short, thin hairs cover the end of the nose. The 

 white hairs which encircle the face grow like a 

 beard on the chin. The whole face has a melancholy, 



