296 ROBERT M. YERKES 



The results thus briefly presented in tabular form prove 

 conclusively that savageness, wildness, and timidity are herit- 

 able behavior-complexes. It is hoped that the further study 

 of these characteristics in the third generation hybrids, and 

 in special matings from the first and second generation hybrids, 

 may yield more definite results concerning the modes of trans- 

 mission. 



