2IO 



E. J. LUND. 



TABLE I. 



Planaria starved 26 days before experiment, and kept at 20 C. for 7 days before 

 and during tests. 20 animals in each bottle. 



TABLE II. 



Planaria starved 14 days before experiment. Temparature 20 C. n days before 

 and during tests. Twenty animals in each bottle. Numbers in the table are 

 averages of three bottles. Limit of experimental error o.oio c.c. oxygen. 



