161] 



RATE OF REGENERATION— ZELENY 



161 



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

 salamanders were well 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 



