Behavior: Dance Movements 



37 



to the right than to the left. I do not wish to emphasize the 

 importance of this difference, for it is not improbable that 

 counts made with a larger number of animals, or even with 

 another group of twenty, would yield different results. 



The most important results of this statistical study of turn- 

 ing are the demonstration of the existence of individual 

 tendencies to turn in a particular direction, and of the fact that 

 the whirling increases in amount from morning to evening. 



In order to discover whether the distribution of the dancers 

 among the three groups which have been designated as right, 

 left, and mixed whirlers agrees in general with that indicated 

 by Table 4 (approximately the same number in each group) 

 I have observed the direction of turning in the case of one 

 hundred dancers, including those of the foregoing tables, and 

 have classified them in accordance with their behavior as 

 is indicated below. 



The left whirlers occur in excess of both the right and the 

 mixed whirlers. This fact, together with the results which 

 have already been considered in connection with the counts 

 of turning, suggests that a tendency to whirl in a certain way 

 may be inherited. I have examined my data and conducted 

 breeding experiments for the purpose of ascertaining whether 

 this is true. But as the results of this part of the investigation 

 more properly belong in a special chapter on the inheritance 

 of behavior (XVIII), the discussion of the subject may be 

 closed for the present with the statement that the prepon- 



