ii GORILLA AND OTHER APES. 99 



Apes related to the Gorilla in these respects — 

 taking the length of the spine, measured in the 

 same way, at 100. In an adult Chimpanzee, the 

 arm is only 96, the leg 90, the hand 43, the foot 39 

 — so that the hand and the leg depart more from 

 the human proportion and the arm less, while the 

 foot is ahout the same as in the Gorilla. 



In the Orang, the arms are very much longer 

 than in the Gorilla (122), while the legs are 

 shorter (88); the foot is longer than the hand (52 

 and 48), and both are much longer in proportion 

 to the spine. 



In the other man-like Apes again, the Gibbons, 

 these proportions are still further altered; the 

 length of the arms being to that of the spinal col- 

 umn as 19 to 11; while the legs are also a third 

 longer than the spinal column, so as to be longer 

 than in Man, instead of shorter. The hand is half 

 as long as the spinal column, and the foot, shorter 

 than the hand, is about ^-ths of the length of the 

 spinal column. 



Thus Hylobates is as much longer in the arms 

 than the Gorilla, as the Gorilla is longer in the 

 arms than Man; while, on the other hand, it is 

 as much longer in the legs than the Man, as the 

 Man is longer in the legs than the Gorilla, so that 

 it contains within itself the extremest deviations 

 from the average length of both pairs of limbs.* 



* See the figures of the skeletons of four anthropoid 

 apes and of man, drawn to scale, p. 76*. 



