REPORT OF COMMISSIONERS OF INLAND FISHERIES. 217 



the influence upon (1) frequency of the molting process; (2) per 

 cent, of increase in length of molts. 



3. A decrease in food supply or the presence of injuries prolong 

 the stage periods and diminish the rate of growth. 



4. Excessive light may modify the rate of growth by (1) increas- 

 ing the duration of the stage periods; (2) by decreasing the percentage 

 of increase at each molt, and (3) indirectly, by favoring the growth 

 of parasites. 



The writer would take this opportunity to acknowledge his 

 indebtedness to Dr. A. D. Mead and Prof. F. P. Gorham, of Brown 

 University, for many helpful suggestions and references; to Mr^ 

 V. E. Emmel for valuable data on the effect of injury and regenera- 

 tion upon the growth of the lobster, also to Mr. E. W. Barnes, 

 Assistant Superintendent of the Wickford Experiment Station, for 

 many kindnesses. 



