80 ANTHROPOID APES. 



angle of the eye somewhat resembles that of the 

 gorilla. 



A general physiognomical distinction between 

 the gorilla and the chimpanzee consists in the fact 

 that the bridge of the nose is shorter in the latter 

 than in the former. In the chimpanzee this part 

 of the organ is depressed, yet the depression is 

 of a conical and convex form, and is covered with 

 a network of wrinkles of varying depth. In the 

 (ihimpanzee the interval between the inner angle 

 of the eye and the upper lateral contour of the 

 cartilaginous end of the nose is shorter than in the 

 gorilla. There is also some difference in the form 

 of the nose : it is on the whole flatter, the tip is less 

 appa'entj the nostrils are not so widely opened nor so 

 thickly padded. (Fig. 3.) In the chimpanzee, as 

 well as in the gorilla, a central and vertical furrow 

 directly divides the triangular nostrils, and these 

 are likewise divided from the rest of the face by the 

 broad pear-shape furrow which surrounds them. The 

 upper lip is generally high, sometimes as high as 

 30 mm. ; but in some individuals it is much lower. 

 As in the gorilla, the chin forms a triangle of equal 

 sides, with its apex reversed. 



The external ear of the chimpanzee has on the 

 whole less resemblance to the human ear, and its 

 contour is larger than that of the gorilla. But this 

 organ varies so much in individuals that it is difficult 

 to lay down any rule for its average size. It ranges 

 from 59 to 77 mm. in length, and from 42 to 80 mm. 

 in width. Many individuals have a distinct lobule 

 to the ear, others not. (Fig. 5.) In this example 



