811 



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 tlie three longest removals the increase is 

 very sliglit. 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 



13.0 



16.7 



1.5 2.6 4.6 8.2 



— >- Lengths removed in mm. 

 Figure 28 Rana damitans First regenerations Twelve and a lialf days 



13.0 



16.7 



1.5 2.6 4.6 8.2 



— >■ Lengths removed in mm. 

 Figure 29 Rana claiiiitaits First regenerations Specific lengths Twelve and 

 a half days 



