1915] Andrews: Turtles Discriminate Between Sounds 
195 
weather had become very chilly, and the turtles were disinclined 
to eat. 
From these experiments it seems safe to infer that the turtles 
of the two species tested are able to discriminate between certain 
sounds. The individuals used all reacted in a different manner 
to the bell, which indicated that they might obtain food, than 
they did to the whistle which meant punishment. Moreover, 
several incidents in the course of the experiments, such as getting 
up on the zinc plate and then getting down at once when the 
whistle sounded strengthen this conclusion. 
BIBLIOGRAPHY 
Casteel, D. B. 1911 The Discriminative Ability of the Painted Turtle. 
J. Animal Behav., vol. 1, pp. 1-28. 
Zoological Laboratory, 
University of Wisconsin. 
Nov. 8, 1915. 
