82 



ILLINOIS BIOLOGICAL MONOGRAPHS 



182 



0.9, 1.1, 1.8, 2.7, 5.5 and 6.8 mm. as shown in Table 42 and Figure 30. 

 There is a regular increase with increase iu removed length. The 

 specific lengths are 0.60, 0.42, 0.39, 0.33, 0.42 and 0.40 as shown in 

 Table 42 and Figure 31. Though there are irregularities the specific 

 lengths approach constancy at all levels except the most distal one. 

 Between eighteen and fifty-six days there is practically no increase 



mm. 

 7.0 



4.0 

 3.0 



1.0 



1.5 2.6 4.6 8.2 



— >■ Lengths removed in mm. 

 Figure 30 ' Rana dainiians. First regenerations 



Eighteen days 



mm. 



0.70 

 0.60 

 0..50 

 0.40 

 0.30 

 0.20 

 0.10 



Figure 31. Ran 

 days 



1..5 2.6 4.6 8.2 13.0 



— y Lengths removed in mm. 

 ' daiiiitans First regenerations Specific lengths 



