BEHAVIOR OF RACCOONS 259 



unproved so long as an experiment, by the absence of appro- 

 priate control tests, fails to eliminate the possibility of a' "stim- 

 ulus-response " type of behavior, and we maintain that this 

 possibility of a sensory-motor interpretation of the raccoon's 

 behavior in this discrimination has been rather adequately 

 demonstrated by our tests. 



