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ILLINOIS BIOLOGICAL MONOGRAPHS 



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TABLE 68 



Amblystoma punctatum Series 4600-5052 



Percentage increment of regenerating tail per day during each time period for 



five different levels 



Experiment V Amblystoma punctatum Tail Series 4101-4540 



The experiment consists of the regenerations of removed halves of the 

 tail without additional injury in some individuals and with an additional 

 removal of tlie two forelegs in others. Measurements were made at nine 

 periods, 2, 4, 6, 8, 10, 12, 14, 16 and 19 days after the operation. The rates 

 of regeneration are given in Table 69. The number of individuals for most 

 of the levels is five. The full data are discussed in the section on the 

 effect of degree of injury. The average rate for each of the different 

 times shows that the maximum comes during the eight to ten day period. 

 The high value for the greater degree of injury at 14 to 16 days is 

 due to the death during that period of the two individuals with the 

 lowest values. The result agrees very well with the maximum rate in 

 Experiment IV. 



The percentage increments are given in Table 70. The highest 

 value comes during the two to four day period followed by decrease 

 with but little irregularity. 



