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ILLINOIS BIOLOGICAL MONOGRAPHS 



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TABLE 64 



Rana clamitans Series 3676-3765 First regenerations 



Percentage increment of regenerating tail per day during each time period 



for six different levels 



Experiment III Rana clamitans . First and second regenerations 

 OP THE tail Series 3628-3675 



For comparison with the data of experiments I and II it is of 

 interest to note the results obtained from this entirely different 

 series of the same species which was designed primarily for the 

 comparison of first and second regenerations. A full description of tlie 

 experiment is given in the section on the effect of successive removal 

 upon the rate of regeneration. The data of specific value for present 

 purposes are given in Table 65. Measurements were made only at six 

 and at eight days after the operation. Fifty percent in length of the 

 tail was removed in both first and second regenerations. Twenty- one 

 individuals are available for first and sixteen for second regenerations. 



The rates per day are 0.52 mm. for 6 to 8 days for first regener- 

 ations as compared with 0.50 for the same period in Experiment II and 

 0.62 for second regenerations as compared with 0.50 in Experiment I. 

 The specific rate per day for 6 to 8 days for first regenerations is 0.049 



