Law Governing Loss of Weight in Starving Cassiopea. 



73 



Table 14 shows the decline in weight of a normal medusa of Cassiopea 

 xamachana starved 25 days in the dark, in filtered sea-water, at 27.5° to 30" 

 C, from June 28 to July 23, 1912, at Tortugas, Florida. The medusa was 

 placed in a glass aquarium holding 6 liters, the water being changed once in 

 each 24 hours. 



Table 14. 



' According to formula y = 32.77(1 — 0.0639)*. 



a 15 



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 



Days X 

 Diagram illustrating Table 14. 



Table 15 shows the decline in weight of two medusae of Cassiopea 

 xamachana starved in diffuse daylight in constantly changing, filtered sea- 

 water at temperatures ranging from 27.3° to 30.1° C, at Tortugas, Florida, 

 from July 10 to August 4, 191 1. Compare this with table 16. 



These medusae were starved side by side in the same 6-liter glass vessel 

 and were subjected to the same changes of temperature, water, light, etc. 

 Being in running water, they lost weight more rapidly than one would 

 expect had they been in semi-stagnant water. 



Table 15. 



' Calculated from formula y = 40.6(1 — 0.1015)*. 

 » Calculated from formula y = 37.16(1 — 0.102)*. 



