296 



WALTER S. HUNTER 



TABLE V 

 Maze Rotated 270° to the Left 



The explanation which was postponed above concerned the 

 question as to wh}^ some of the birds were not confused by the 

 rotation. The only one which seems warranted to the writer 

 by these experiments is as follows : It seems very probable that 

 the two main sensory cues used both in learning the maze 

 and in running it after it is learned are visual and kinaesthetic 

 sensations. The visual cues may be again sub-divided into 

 those arising from A\ithin and those arising from without the 

 maze (an example of the latter would be the relation of the walls 

 and boxes of the large cage to the maze). This limitation 

 of the number of cues is based: (i) Upon Rouse's conclusion 

 that tactual sensations are non-functional; (2) upon the common 

 belief that olfaction is not present in birds; and (3) upon the 



