292 Journal of Comparative Neurology and Psychology. 



mum amount of movement left no opportunity for judging of 

 the influence of the auditory stimulus it was always necessary 

 in such cases so to alter the intensity of the tactual stimulus 

 that a medium reaction would result. 



The animals seldom struggled during experiments, but if 

 too firmly bound they became irresponsive to the stimuli.^ 

 It was therefore necessary to place them carefully in posi- 

 tion, and then, after they had ceased to struggle, to draw 

 the linen bands over them just tightly enough to prevent change 

 in position. For the purpose of excluding the influence of vis- 

 ual stimuli a wire screen cap covered with black cloth was put 

 over the head. This served to help keep the frog in the prop- 

 er position as well as to exclude visual stimulation. 



TABLE I. 

 The Influence of Sound on the Tactual Reactions of the Green Frog. 



■M indicates maximum movement of leg. 



'A case of inhibition. 



