40 THE MAX-LIKE APES. i 



down if, whilst pursued, lie has no opportunity of 

 escaping by climbing. . . . When he walks in the 

 erect posture he turns the leg and foot outwards, 

 which occasions him to have a waddling gait and 

 to seem bow-legged/ 7 



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 rais- 

 ing 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 their hands to the ground, and assist them- 

 selves forward, rather jumping than running, still keep- 

 ing the body, however, nearly erect." 



Somewhat different evidence, however, is given 

 by Dr. Winslow Lewis: * 



" Their onlv manner of walking was on their 

 posterior or inferior extremities, the others being 

 raised upwards to preserve their equilibrium, as 

 rope-dancers are assisted by long poles at fairs. 

 Their progression was not by placing one foot be- 

 fore the other, but by simultaneously using both, 

 as in jumping." Dr. Salomon Muller also states 

 that the Gibbons progress along the ground by 

 short series of tottering jumps, effected only by 

 the hind limbs, the body being held altogether 

 upright. 



But Mr. Martin (/. c. p. 418), who also speaks 



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



