RHEOTAXIS IN ISOPODA 



281 



High oxygen 



Chart 5 The rheotaclic and concussion responses of isopod no. XI. For 

 methods of charting, see chart 1, p. 275. 



Chart 5 A The effect of molting on the positive response and efficiency m 

 isopod no. XI. For detailed account, see p. 285. The system of charting is the 

 same as that given in chart 1, p. 275. The spaces on the base line represent days. 



