76 MAN AN ADAPTIVE MECHANISM 



Drawn by W. J. Brownlow from Dr. A. E. Brehm's " Life of Animals." 



FIG. 6. CONTEST BETWEEN ANT-BEAR AND PUMA. 



This attack with teeth and claws upon unprotected parts illustrates the 

 method by which deep ticklish points may have been evolved, and explains 

 why trauma of these parts produces the greatest shock. 



bite each other in their ticklish points, giving a mimic 

 representation of ancestral fights, as well as of fights to 

 come. Children commonly and with glee fling them- 

 selves upon one another in the same attitude; one 



