116 NENOZO UTSURIKAWA 



The fractions of column 3 in this table indicate the relative 

 frequency of the forward position, that is, the presence of a 

 rat forward or its movement to that position on the approach 

 of the experimenter. The numerator of the fraction indicates 

 frequency of this position ; the denominator indicates the total 

 number of observations on the individual. 



The chief results of these observations on the position of 



