28 Journal of Comparative Neurology and Psychology. 



(i) the animal may not have profited in the least by its previous 

 experience in the maze; the situation may offer a problem de 

 novo', (2) the rat may orient itself immediately as does a human 



sxn. 



Fig. 1. 



being, when, in a partially strange situation, he suddenly finds 

 some thoroughly familiar landmark; (3) immediate orientation 

 may not occur, and yet the situation may not be entirely new to the 

 rat; it may exhibit some random movements before starting 



