161] 



RATE OF REGENERATION —ZELENY 



161 



few days after they had left the egg envelopes and was kept until the 

 salamanders were weU advanced in their metamorphosis. Since in young 

 salamander larvae the border line between old and regenerated tissue is 

 soon obliterated it became necessary to devise another method of testing 

 completeness of regeneration than the direct measurement of the regen- 



TABLE 105 

 Rana clamitans Series 3628-3675 



Regenerated 



length 



Twenty 



days 



5.9 

 5.2 

 4.9 

 5.5 

 5.9 

 5.8 

 5.6 

 5.2 

 5.9 

 5.6 

 5.6 

 5.9 

 4.7 

 4.6 

 5.5 

 6.1 

 5.6 

 5.5 

 4.3 

 5.2 

 5.1 

 5.0 

 6.0 

 6.0 



Percent of removed 

 part regenerated 



