81] 



RATE OF REGENERATION —ZELENY 



81 



Between twelve and a half and eighteen days the regenerated 

 material is decreasing in the case of the two shortest removals, has made 

 no progress in the third and in the three longest removals the increase is 

 very slight. The data therefore are of value more particularly in con- 

 nection with the problem of the relative completeness of regeneration 

 from the different levels. The regenerated lengths at eighteen days are 



mm. 

 6.0 



5.0 

 4.0 

 3.0 

 2.0 

 1.0 



1.5 2.6 4.6 8.2 



— >■ Lengths removed in mm. 

 Rana clamitans First regenerations 



13.0 



16.7 



Twelve and a half days 



1.5 



13.0 



2.6 4.6 8.2 



— y Lengths removed in mm. 

 Figure 29 Rana clamitans First regenerations Specific lengths 

 a half days 



16.7 



Twelve and 



