USELESS HABITS IN TWO BRITISH NEWTS. 175 



slightly to the right, it was able to fall out and across the 

 entrance of r, into which it turned. The next day it merely 

 walked out of I, but on the left side, and inclined towards r be- 

 tween x and y in the figure. It did not turn into r, but around 

 by a. The second trial, the same route was taken. I have no 

 record as to what happened on the third, but on the fourth it 

 went through the climbing process and fell out, and for the first 

 time immediately turned into r. Precisely the same thing 

 happened in the next trial, but afterwards the I, r gradually 

 gave way to the I, a, r. The " fall out" appeared to revive the 

 habit of the day before, which a new habit finally overcame. 



(To be continued.) 



