22 



ELIZABETH LOCKWOOD THOMPSON 



TABLE III-B 



Showing the distribution of responses of each 50 trials of the 250 trials of the 

 food-pressure " stimulus series. 



Snail No. 4 



From Table III it appears that when two stimuU were apphed 

 simultaneously, food to the mouth and pressure to the foot, 

 there was at first an inhibitory effect upon the reflex. This is 

 shown in the first 60 to 80 trials in which no reaction followed 

 the application of the double stimulus. When this table is 



