346 'Journal of Comparative Neurology and Psychology. 



sons. He was very playful aud enjoyed being handled. He was 

 as free with strangers as with familiar persons and would pull aud 

 play with sticks, pencils, umbrellas or any other thing that any 

 one held out to him. If a person got sufficiently near his cage, he 

 would dig into his pockets for handkerchiefs. As a rule he was 

 not attentive to the other animals; he preferred to attract human 

 attention. For this reason it was difficult to get him to watch 

 the other animal in the imitation tests. He stood third in suprem- 

 acy in the large cage, yielding only to !No. 4 and ]^o. 5. He 

 was four years old and had been in the Park two years. 



]^o. 8, Cebus hypoleucus, male, was a new arrival at the Park. 

 He was old, aj^parently seven or eight years of age, and one canine 

 was missing; the other teeth were very large. He was large and 

 lank, with long bony arms and legs. He moved slowly and Avhen 

 in a new situation was quiet and sluggish. Pie was used in one 

 imitation experiment only and failed in that. He was apparently 

 afraid most of the time and was whipped by animals much smaller 

 than himself. 



No. 9, Cebus flavus, male, was the smallest animal used in the 

 investigation. Pie was probably but little over a year old and had 

 been in the Park but six weeks, having come in with ISTo. 8 and 

 six others. He was very much of a baby, riding on the back of 

 his cage mate most of the time. He was quite excitable and cried 

 a great deal when alone. When with No. 8 he was a perfect para- 

 site, stealing food and riding. Toward No. 3, he developed a fight- 

 ing attitude and under the protection of No. G almost worried No. 

 3 to death during one night. He did not want to be touched by 

 persons, but his fear did not keep him from getting food within 

 his reach. 



2. Macacus Monl-eys. 



(a) General Characteristics. — The Macacus is the most coinmon 

 form of the Eastern monkey. The group contains twenty-five species, 

 many of which are found in captivity and are among the most hardy 

 of captive monkeys. The most common form is the Macacus cyno- 

 molgus which is found in various parts of Asia and in the East 

 Indian Islands. The tail of this species is quite long and is one 



