6 



WALTER S. HUNTER 



R 



FIG. 2. THE TEMPORAL MAZE 



E is the entrance-stop which can be shifted right or left as indicated by the 

 dotted lines; es, the end-stop; L and R, points referred to in the paper. The 

 three partitions in each of the side alleys were present in only one*control test 

 with rat 110. They were present in no other test. 



FIG. 3. A SPATIAL MAZE COMPOSED OF SUCCESSIVE T-SHAPED UNITS WHERE THE 

 CHOICES ALTERNATE AS llrrllrrll 



E is the entrance, and F the food-box. 



