72 



Papers from the Marine Biological Laboratory at Tortugas. 



Immediately after the twentieth weighing the medusa was 

 placed in the dark and thenceforth maintained in darkness until the 

 end of the experiment. The results are given in table 13. When 

 the records ceased, maceration had begun. 



Table 12. 



I According to formula 

 y = 41-3(1 - 0.114s)*. 



X 88UIIUBJ0 



Diagram illustrating Tables 12 and 13. 

 Table 13. 



' According to the formula y = 3.2(1 0.15)*. 



'An error in weighing. 



