252 



MIND IN EVOLUTION 



7 



Evidence of pro- 

 cesses guiding 

 animal indepen- 

 dent of 

 experimenter. 



x <u tf. 



n 3rd 

 trials 



Accid 

 and 



&* 



s-ls.-sl 



i 



S 



(X V 



S" 3 

 in 



3.fl 



a 





' 



. 





t/J^'rt 



-Sil 

 'iis 



cS '~' 



t/D 



l-i 





Z2 (J 



rt w 





B ? 



* 



K 



C/3 



C/ 



|r 



CO 



