MAN AND APES. 149 



complex tricks and performances, but the less 

 man-like American Monkeys — the common 

 Sapajous — are habitually selected by peripa- 

 tetic Italians for the exhibition of the most 

 clever and prolonged performances. 



As to the two species of Sapajou, the brains 

 of which are so different the one from the 

 other, Professor Rolleston asks : " Will any- 

 body pretend that any difference can be de- 

 tected in the psychical phenomena, the mental 

 manifestations of these creatures, at all in 

 correspondence or concomitant variation with 

 their differences of cerebral conformation ?" 



The difference between the brain of the 

 Orang and that of man, as far as yet ascer- 

 tained, is a difference of absolute mass. It is 

 a mere difference of degree, and not of kind. 



Yet the difference between the mind of man 

 and the psychical faculties of the Orang is a 

 difference of kind, and not one of mere 

 degree.* 



Thus, on the one hand we see that we may 

 * See 'Quarterly Review,' July 1871. 



