REPORT OF COMMISSIOXERS OF INLAND FISHERIES. 



205 



conducted, thus producing in each compartment the el^ect of twi- 

 light. There are no very definite data to show that this condition 

 did actually create an advantageous influence upon the growth of 

 the young lobsters. It is a noteworthy fact, however, that in the 

 case of other lobsters from the same source, but which were confined 

 in wire cages without covers, the stage-periods were, as a rule, longer 

 and the percentage of increase correspondingly less. The results that 

 have been obtained, though too few to warrant definite conclusions; 

 are stated in the following tables: 



Table Xo. 23. 



Showing the effect of sunlight upon the duration of the stage-period of 

 fourth stage lobsters. 



