MYCETES SENICULUS 199 



human beings were almost unanmious against this possibihty. Theoretically, 

 it is likely that monkeys learn more from watching each other than 

 from watching human beings. Professor Thorndyke's observations in this 



Courusy, American Museum oj Natural History 



FIGS. 103 AND 104. HAND AND FOOT OF MYCETES SENICULUS. 



Left. Dorsum of hand showing well-marked fingers and finger-nails. 



Right. Dorsum of foot showing well-developed hallux, long finger-like toes and prominent toe-nails. 



connection were somewhat limited. They do not seem to favor the hypothesis 

 that these monkeys have any general abihty to learn to do things by see- 

 ing them done by others, even of their own kind. This question is still to some 

 extent an open one, requiring much more extensive study than it has yet 

 received. 



Concerning the general mental development of monkeys, Thorndyke 

 believes that they represent a certain advance from the generalized mam- 

 malian type toward man. This is particularly true of their sensory equipment 

 and their localized vision. Their motor equipment provides for the coor- 



