308 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



cells have utilized a part of the energy of food material normally available 

 for the cells concerned in the process of molting. 



This assumption seems to be strongly supported by the compari- 

 son of the effects of those mutilations in the preceding experiments, 

 which were followed by the regeneration of the chelipeds, with the 

 effect of mutilations which were not succeeded by this regeneration. 

 In both cases the initial disturbance of the organism, due to mutila- 

 tion, was exactly the same. Now if the assumption that the regen- 

 erating limbs utilize a portion of the energy normally available for 

 the process of molting is correct, then there would be more energy 

 diverted from the molting process in the regenerating specimens than 

 in the mutilated, non-regenerating ones, and the rate of molting for 

 the non-regenerating specimens would be greater than the rate for 

 the regenerating specimens. The results of the experiments demon- 

 strated that this was actually the case. 



Again, it is evident that this assumption that the regenerative 

 cells divert and utilize some of the energy normally available for 

 molting is in accord with those results in the experiments which 

 show that the greater the amount of regeneration, as determined by 

 the degree of injury, the slower the rate of molting; and that the 

 later the process of regeneration is introduced after the molt, the 

 greater the length of the whole molting period. 



3. An important phase of the problem of regeneration is to 

 determine in what respects this phenomenon is similar to the process 

 of growth. The fact that in these experiments the process of re- 

 generation retarded the process of molting and decreased the rate of 

 growth seems to support the theory that " the phenomenon of regener- 

 ation belongs to the general category of growth phenomena."* For if 

 the assumption is correct that the regenerating cells have, either 

 directly or indirectly, utilized the energy which otherwise would 

 have been distributed to the cells involved in the molting process, 

 then it is evident that we have here energy available either for the 



♦(Morgan T. H. Regeneration, 1901 page 292.) 



