76 



Papers from the Marine Biological Laboratory at Tortugas. 



6 8 10 12 1^ 



Diagram illustrating Table 1 8. 



20 



the normal medusae described on table 17. The stomach and mouth-arms 

 were cut off and the disk cut into halves. One half (Disk A) was starved 

 in doubly filtered sea-water which had been heated to 71° C; the other half 

 of the same disk (Disk B) was starved in doubly filtered sea-water which 

 had been placed in a vacuum to expel most of its dissolved air. The 

 third half disk (Disk C) was taken from another medusa and was starved 

 in normal doubly filtered sea-water. 



Table 19 shows the decline in weight of two regenerating specimens of 

 Cassiopea xamachana starved 19 days in diffuse daylight, in filtered sea-water 



Table 19. 



' Calculated according to formula y = 25.48(1 — 0.1034)*. 

 -'^ 2 Calculated according to formula y = 41.87(1 — 0.0689)*. 



1 2 3 4 5 6 7 8 9 10 H 12 13 14 15 16 17 18 19 

 Days X 

 Diagram illustrating Table 19. 



