288 



Table V. 

 Regeneration in Obelia of rings only, after cuts at all levels. 





No. of cases 



Percentages 



No. of rings 











No. of cases 



Sums from 



regenerated 



observed 











observed 



beginning 



2 



9 



2,2 



2,2 



3 



56 



13,7 



15,9 



4 



95 



23,3 



39,2 



5 



84 



20,6 



59,8 



6 



70 



17,2 



77,0 



7 



52 



12,7 



89,7 



8 



19 



4,7 



94,4 



9 



16 



3,9 



98,3 



10 



6 



1,5 



99,8 



11 



1 



0,2 



100,0 





408 





Table VI. 

 Regeneration in Obelia of unsegmented tract after cuts at all levels. 





No. of cases 



Percentages 



No. of rings 







regenerated 



observed 



No. of cases 



Sums from 







observed 



beginning 



6 



4 



1,9 



1,9 



7 



10 



4,7 



6,6 



8 



22 



10,3 



16,9 



9 



40 



18,7 



35,6 



10 



39 



18,2 



53,8 



11 



40 



18,7 



72,5 



12 



26 



12,1 



84,6 



13 



13 



6,1 



90,7 



14 



14 



6,5 



97,2 



15 



1 



0,5 



97,7 



16 



3 



1,4 



99,1 



17 







0,0 



99,1 



18 



2 



0,9 



100,0 





214 





The curves, fig. 2, 3, 4 and 5, are constructed respectively from 

 tables I, II, III and IV— VI together, the figures being taken from 

 the third column of those tables — the column headed "Percentages : 

 No. of cases observed". 



