136 Instinct and Intelligence 



work the mechanism and gave up trying in de- 

 spair. Its companion, however, came out of her 

 cage, the first one following her; number two 

 went to the box, pulled the fastening about and 

 ultimately seized the end of the plug with her 

 teeth and pulled it out of its clasp. The box 

 was again set ; the first animal made a rush for 

 it, seized the plug as number two had done, and 

 got her food. She repeated this act several 

 times. 1 



In our opinion the behaviour of this family of 

 apes is attributable to instinctive processes 

 fertilised, as it were, by nervous energy derived 

 from the living substance of the association 

 areas of their cerebral cortex, and therefore 

 possessing a tinge of intelligence. 2 



The neopallium of Baboons and Anthropoid 

 Apes is largely developed in all directions as 

 compared with that of their lower brethren, and 

 with this structural development their instincts 

 and intellectual powers have risen to a higher 

 standard. For instance, the author was out with 

 a shooting expedition among the hills near a 



1 The Animal Mind, by M. F. Washburn, pp. 238-10. 



2 Psychology, "The Study of Behaviour," by W. McDougall, 

 p. 164. 



