138 Papers from the Department of Marine Biology. 



Table 2.— Record of experiments 12 and 12a (Jor 1 day to 9 days)— Continued. 



[Forty disks each with insulated halves, one with sense-organs, the other without. Mg. sea- 

 water. The letter C after the measurement for any day indicates that the central cavity 

 had been filled by the regenerated tissue.] 



Specimen. 



No. 17 



No. 18 



No. 19 



No. 20 



No. 22 



No. 23 



No. 24 



No. 25 



No. 26 



No. 



No. 28 



No. 29 



No. 30 



No. 31 



No. 33 



No. 34 



No. 36 



No. 37 



No. 38 



No. 39 



No. 40 



Half with S. O . . . . 

 Half without S. O 

 Half with S.O... 

 Half without S. O 

 Half with S. O . . . . 

 Half without S. O 

 Half with S. O . . . , 

 Half without S. O 

 -, ^. f Half with S.O... 

 ^^°- -^ *! Half without S. O 

 Half with S. O . . . 

 Half without S. O 

 /Half with S.O... 

 IHalf without S. O 

 [Half with S. O . . . 

 \Half without S.O 

 Half with S. O . . . 

 \Half without S.O 

 [Half with S.O... 

 \HalfwithoutS. O 

 [Half with S.O... 

 \Half without S. O 

 [Half with S. O . . . 

 \Half without S. O 

 [Half with S.O... 

 \Half without S.O. 

 [Half with S. O . . . . 

 \Half without S.O. 

 [Half with S. O . . . . 

 \Half without S. O 

 ,, „^ [Half with S. O . . . . 

 ^°- ''- \Half without S.O. 

 [Half with S. O . . . . 

 \Half without S.O 

 Half with S. O . . . . 

 Half without S. O . 

 vr oc [HalfwithS. O... . 

 xMo. 6i> ^Half without S. O 

 HalfwithS. O... 

 Half without S. O 

 Half with S. O . . . 

 Half without S. O 

 Half with S. O . . . 

 Half without S. O 

 HalfwithS. O... 

 Half without S. O 

 HalfwithS. O... 

 Half without S. O 

 Mean of all observations: 

 HalfwithS. O... 

 Half without S. O 



1 day. 



2 days. 



1.75 

 0.50 

 2.25 

 1.00 

 2.75 

 1.50 

 1.50 

 0.75 

 3 . 00 

 1.50 

 2.25 

 1.00 

 1.50 

 0.75 

 2.00 

 0.75 

 1.25 

 0.50 

 1.75 

 0.50 

 2.50 



1.00 

 2.25 

 1.00 

 1.75 

 1.00 

 2.75 

 1.75 

 2.25 

 1.00 

 1.50 

 0.50 

 2.00 

 0.75 

 1.00 

 0.25 

 1.75 

 1.00 

 2.25 

 1.00 

 1.50 

 0.75 

 2.75 

 1.00 

 2.25 

 0.75 

 1.50 

 0.50 



2.00 

 0.85 



2.50 



1.25 



3.00 



1.50 



3.25 



2 



2 



00 

 25 

 1.50 

 3.50 

 2.00 

 2.75 



1.50 

 2.25 

 1.25 

 2.50 

 1.50 

 2.00 

 1.00 

 2.25 

 1.00 

 3.25 



75 



00 



,75 



.50 



.75 



.25 



.50 



3.00 



1.50 



2.50 



1.25 



2.75 



1.50 



1.75 



1.00 



2.50 



1.50 



3.00 



1.75 



2.25 



1.50 



3.50 



1.75 



3.00 



1.50 



2.25 



1.25 



2.35 

 1.43 



3 days. 



4 days. 



3.25 

 2.00 

 3.75 

 2.25 

 4.50 

 2.50 

 3.00 

 2.00 

 4.25 

 2.50 

 3.25 

 2.00 

 3.00 

 2.00 

 3.25 

 2.25 

 2.75 

 1.50 



3.00 

 1.50 

 4.00 

 2.50 

 3.50 

 2.25 

 2.00 

 2.25 

 4.00 

 2.25 

 3.75 

 2.25 

 3.25 

 2.00 

 3.25 

 2.00 

 2.50 

 1.75 

 3.25 

 2.25 

 3.50 

 2.50 

 3.00 

 2.25 

 4.25 

 2.50 

 3.50 

 2.25 

 3.00 

 2.75 



2.92 

 2.00 



5 days. 



4.00 

 2.50 



50 



75 



25 



25 



75 



50 



75 



25 



75 



2.50 



3.75 



2.75 



75 

 75 

 50 

 25 

 00 

 2.50 

 4.75 

 3.25 

 4.00 

 3.00 

 3 . 75 

 2.75 

 5.00 

 3.00 

 4.50 

 3.00 

 3.75 

 2.75 

 4.00 

 2.75 

 3.25 

 2.00 

 3.75 

 2.75 

 4.00 

 3.25 

 3.75 

 2.75 

 5.00 

 3.25 

 4.25 

 3.00 

 3.50 

 2.75 



3.55 



2.85 



6 days. 



75 



25 



00 



50 



00 



75 



4.50 



3.25 



5.25 



3.75 



4.50 



3.25 



4.25 



3.50 



4.50 



3.25 



4.75 



2.00 



4.75 



3.25 



5.50 



4.00 



4.75 



3 . 50 



4 . 25 



50 



00 



75 



25 



75 



50 



50 



50 



25 



00 



75 



50 



3.50 



4.50 



4.00 



4.50 



3.50 



5.75 



4.57 

 3.45 



25 



00 



00 



25 



75 



4.25 



5.50 



4.00 



6.00 



4.50 



5.25 



4.00 



6.50 

 4.75 

 5.50 

 4.00 

 5.00 

 4.25 

 6.75 

 4.00 

 6.00 

 4.50 

 5.25 

 4.25 

 5.25 



00 



00 



50 



26 



25 



25 



75 



25 



25 



6.50 



4.75 



5.50 



4.50 



5.00 



4.25 



5.17 

 4.23 



7 days. 



6.00 

 4.75 



00 



25 



50 



00 



25 



75 



75 



25 



6.00 



4.75 



5.75 



00 

 75 

 50 

 00 

 25 

 6.00 

 4.50 

 7.50 

 5.50 

 6.25 

 4.75 

 5.75 

 5.00 

 7.50 

 5.00 

 6.75 

 5.25 

 6.00 

 5.00 

 6.00 

 4.75 

 5.75 

 4.25 

 6.00 

 4.75 

 6.00 

 5.50 

 6.00 

 5.00 

 7.25 

 5.50 

 6.00 

 5.00 

 5.75 

 5.00 



5.94 



4.87 



8 days. 



9 days. 



6.75 

 5.25 



7.00 

 5.25 

 7.50 

 6.00 

 6.50 

 5.50 

 6.50 

 5.75 

 6.25 

 5.00 

 6.75 

 5.00 

 7.00 

 5.25 

 8.25 

 6.25 

 7.00 

 5.25 

 6.50 

 5.75 



7.50 

 6.00 

 6.75 

 5.75 

 6.75 



5.50 

 6.50 

 5.00 

 6.75 

 5.50 

 6.50 

 6.00 

 6.76 

 5.75 

 8.00 

 6.00 

 6.75 

 5.75 

 6.50 

 5.75 



6.47 

 5.74 



7.50 

 6.00 



7.75 

 6.00 



7.25 

 6.25 

 7.25 

 6.00 

 7.00 

 5.75 

 7.50 

 6.00 

 8.00 

 6.25 



7.75 

 6.00 

 7.25 

 6.50 



7.50 

 6.25 

 7.50 

 6.25 

 7.25 

 5.75 

 7.50 

 6.25 

 7.25 

 6.75 

 7.75 

 6.50 



7.50 

 6.50 

 7.25 

 6.50 



7.40 

 6.47 



Experiments with KCN or chloroform dissolved in sea-water did not 

 give satisfactory results. In both these solutions the tissues of the 

 medusa underwent rapid disintegration if the amount of the reagent 

 present was sufficient to bring about any noticeable effect upon the 

 activity of the sense-organs. 



