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ILLINOIS BIOLOGICAL MONOGRAPHS 



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TABLE 99 



Amblystoma punctatum Series 4101-4540 



Length of regenerated tail for different degrees of injury 



Tabulation of firsts for individual comparisons 



Experiment III Amblystoma punctatum Series 4005-4008 



Experiments III, IV, V and VI comprise merely a few individual 

 comparisons obtained from experiments devised principally for the 

 study of other factors. They are included here under the rule that no 

 valid data on the matter at hand are to be excluded. 



In Experiment III the regeneration of the hind-leg is compared 

 under the four conditions of (1) no additional injury, (2) removal of 

 the other hind-leg, (3) removal of the other hind-leg and one fore-leg 

 and (4) removal of the other hind-leg and both fore-legs. The data 

 are given in Table 100. 



Three sets of comparisons were made at twelve days after the oper- 

 ations, each with a single individual for each degree of injury. The 

 regenerating hind-leg with no additional injury is distinctly behind the 

 cases with additional injury. The greatest regenerated length comes in 

 one case with an additional injury of one hind-leg plus one fore-leg and 

 in two cases with one hind-leg plus two fore-legs. The averages begin- 



