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Mary Isahelle Steele 



hermit crabs nor Crangon regenerate these appendages in less time. 

 In the regeneration of a functional eye it was seen in a previous 

 section that hermit crabs regenerate rather more rapidly than 

 Palaemonetes but that Palaemonetes regenerate more rapidly than 

 Crangon. Palaemonetes may regenerate a functional eye in thirty 

 to thirty-five days. It is seen, therefore, that appendages are 

 regenerated by Palaemonetes in approximately the same time as 

 they are regenerated in hermit crabs and Crangon. Consequently 

 it does not seem to be assuming too much to express the conviction 

 that a greater amount of time would have made no essential 

 difference in the results of these experiments in which the entire 

 eye of Palaemonetes was removed. 



Below is a brief table showing results obtained by removing the 

 entire eye of Palaemonetes. This table does not include all the 

 individuals of any one series but it is entirely representative. 



It will be seen that Palaemonetes have been under observation 

 practically every month in the year. The results in each instance 

 are negative. Fig. 35*7, h, c represent some of the stumps that show 

 new tissue distal to the nerve stump. Most of the cases, however, 



