40 THE MAN-LIKE APES 1 



says : " He invariably walks in the erect posture 

 when on a level surface ; and then the arms either 

 hang down, enabling him to assist himself with his 

 knuckles ; or what is more usual, he keeps his 

 arms uplifted in nearly an erect position, with the 

 hands pendent ready to seize a rope, and climb 

 up on the approach of danger or on the obtrusion 

 of strangers. He walks rather quick in the erect 

 posture, but with a waddling gait, and is soon run 

 down if, whilst pursued, he has no opportunity of 

 escaping by climbing .... When he walks in 

 the erect posture he turns the leg and foot out- 

 wards, which occasions him to have a waddling 

 gait and to seem bow-legged." 



Dr. Burrough states of another Gibbon, the 

 Horlack or Hooluk : 



' ' They walk erect ; and when placed on the floor, or in an 

 open field, balance themselves very prettily, by raising their 

 hands over their head and slightly bending the arm at the 

 wrist and elbow, and then run tolerably fast, rocking from 

 side to side ; and, if urged to greater speed, they let fall theii 

 hands to the ground, and assist themselves forward, rathei 

 jumping than running, still keeping the body, however, 

 nearly erect." 



Somewhat different Qvidence, however, is given 

 by Dr. Winslow Lewis : x 



" Their only manner of walking was on their 

 posterior or inferior extremities, the others being 

 raised upwards to preserve their equilibrium, as 



1 Boston Journal of Natural History, vol. i. 1834. 



