198 THE LOWER PRIMATES 



greater variety than other mammals. Their combination of such associations 

 is remarkably slow and ineflective in providing any new behavioral acquisi- 

 tion by this means. Nor were experiments involving the discrimination of 



Courtesy, American Museum of Nalurat History 



FIGS. 101 AND 102. HAND AND FOOT OF MYCETES SENICULUS. 

 Left. Palmar surface of hand, showing digitation, well-developed balls of fingers and long, opposable thumb. 

 Right. Plantar surface of foot showing fairly well-developed heel and narrow sole, long finger-like toes, 

 with long, prehensile hallux. 



certain signals designed to set in motion definite lines of action any more pro- 

 ductive of evidence. In experiments under the inlluence of human tuition the 

 problem was — can the monkey learn and does he commonly learn and do things, 

 not by mere selection of the act from amongst the acts done by him, but by 

 getting some idea and then himself providing the act because it is associated 

 in his mind with that idea? As the result of these tests, the conclusion was a 

 negative one. The records which were carefully made show no signs of any 

 influence of tuition to A\hich the animal was subjected. The systematic 

 experiments designed to detect the presence of the ability to learn from 



