90 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[90 



regeneration as in the case of the frog tadpoles. For the three shortest 

 removals regeneration is probably completed at this time biit this is not 

 true for the two longest ones. In this respect as in others there is an 

 agreement with the former experiment. The percent of the removed 

 tail that is regenerated is greater for all levels than in the frog tadpoles. 

 It is probable also that if the longest removals had been allowed to com- 

 plete their regenerations their specific regenerations as in the case of 

 the frog tadpoles would have been shown to be greater than those for 

 medium levels. 



TABLE 45 



Amblystoma punctatum. Series 4600-.50.52. Average tail length =10.9 mm. 



Regeneration: 2 days 



