574 



GABRIELE KASS-SIMON 



3. Initial Tentacle Number (ITN) 



The data are given in Table 3 and the mean ITN's of the four weighted clone 

 means depicted in Figure 3. Again, in each clone no significant différence was 

 found at each of the given levels. If the mean ITN's at JBT are compared within 

 each clone with the ITN's at the other four levels, it will be noted that they are 



NOOF 

 TENTACLES 



AXIAL 

 LEVEL 



Fig. 3. 



Final and initial tentacle number regenerated at various axial levels. The means of the weighted 

 mean number of tentacles counted in four clones at the given axial levels 120 hours (FTN) after 

 transection and at the first protocol period at which tentacles appeared (ITN). (FTN = Final 

 Tentacle Number, ITN = Initial Tentacle Number, JBT=Just Below Tentacles. The Connecting 

 lines are intended only to show that the déclines are not steady). 



not consistently either higher or lower than those of the other levels. This is not 

 true for mean TDT's and hence neither a positive nor négative corrélation can be 

 postulated. Further, no steadily declining gradient appears to exist for this para- 

 meter of the régénération performance. 



4. The différence between Final and Initial Tentacle Numbers (FTN — ITN) 



The data are given in Table 4. For three of the four clones, no significant 

 différence was found between 25%, 50%, 75% and JBT's, in a comparison of ail 



