THE DEVELOPMENT OF A YOUNG MONKEY 119 



I was not able to attract his attention by any noises, but 

 when, rarely, he looked around he was attracted by my moving 

 hand, and followed its movements with his eyes. 



July ig. Second week. 



In catching fleas Dolly frequently pinches the baby with her 

 lips, making him squeal. When he cries she pauses in her 

 flea catching and draws him close, then licks her lips and looks 

 at the sky. In half a minute she is at it again, turning back 

 the hair from his skin and going over him from his nose to the 

 tip of his tail. 



In nursing, the baby bites her nipples until he makes her 

 shudder. When he does this she generally- looks down at him, 

 then stands up and walks about. 



He is beginning to show an interest in objects other than his 

 mother. As she walks along he holds fast by three feet, and 

 swings the other free, reaching toward the ground. He looks 

 around actively all the time when not feeding. When Dolly is 

 still he moves about restlessly in her arms, releases his hold on 

 her fur, and rises slightly on his hind feet. 



July 20. Today the baby tried to escape from Dolly's arms, 

 twisting about and kicking violently. These movements did not 

 seem to be purposive but were rather an undirected, violent 

 squirming. He bites at Dolly's arms and his own hands. When 

 he bit her teat today she first tried pushing his head about with 

 her hands and when this did not make him quit, she pinched 

 him on the shoulder with her lips. This made him chatter, 

 when she immediately gathered him close. When Dolly walked 

 her moving hand caught his attention and he snatched at it, 

 tripping her. She pressed him up firmly into position and 

 went on. This was repeated several times. 



When looking at me he sometimes purses his lips and thrusts 

 out his tongue and sometimes reaches towards me. Most of his 

 movements are of the larger limb muscles; the fingers are not 

 moved separately. He does not imitate any of Dolly's move- 

 ments. 



July 22. He is beginning to give Dolly trouble to hold him. 

 As soon as she sits down he struggles to escape, reaching over 

 her arm to the ground with his hands, then kicking out his feet. 



