146 



ILLINOIS BIOLOGICAL MONOGRAPHS 



TABLE 88 

 Amblystoma punctatum Series 4101-4540 

 Length of regenerated fore-leg for different degrees of injury 

 Tabulation of lowest values for individual comparisons 



[146 



Experiment II Amblystoma punctatum Series 4101-4540 

 This experiment deals with the same series of individuals as Experi- 

 ment I. The comparison in this case however is one between the regen- 

 eration of the removed half of the tail when it alone is removed and its 

 regeneration when there is an additional removal of the two fore-legs. 

 The data are given in Tables 89 to 99. At two days the regeneration of 

 the tail without an additional injury is 0.35 mm. and with an additional 

 injury 0.27. The corresponding values at 4 days are 0.73 and 0.81, at 

 6 days 1.32 and 1.31, at 8 days 2.06 and 2.26, at ten days 3.44 and 3.27, 

 at twelve days 4.36 and 4.20, at fourteen days 4.82 and 4.94, at sixteen 

 days 5.57 and 6.00 and at nineteen days 5.90 and 6.06. The regenerating 

 tail with no additional injury is ahead at four times and the one with 

 additional injury is ahead five times. In thirty three individual com- 



