OBSERVATIONS AT NEW YORK ZOOLOGICAL PARK 151 



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Ack seems to be the same word as uck^ pronounced with 

 the mouth in a more open position. Both of these expres- 

 sions, as well as gah, appear to be variant forms of gahk, the 

 food-word. 



Boma had an intense dislike of having any other creature 

 appear on the grass plot or the walk in front of the windows 

 opposite his cage. In order to test him for a possible fear 

 reaction, the keeper arranged for a pony with a light con- 

 spicuous mane to be led by the windows, the full length 

 of the primate house. He started at the end farthest from 

 the chimpanzees, and passed, one after another, the various 

 monkeys, the baboons, the gibbon, and the orang utans. 

 The first note of alarm from the monkeys aroused Boma. He 

 climbed high on the front bars of his cage, and strained to see 

 what was troubling them, uttering at the same time a threat- 

 ening wah-hoo. 



