292 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



Series. Regenerating lobsters. Non-regonerating lobsters. 



C4 16 .8 days 



C5 16.9 days 16.3 days 



C7 18.1 days 14.3 



Cg 18.7 days 14.1 



C9 18 . 9 days 14.9 days 



Cjo 20.8 days 14.0 days 



Cii 21.7 days 14.6 days 



C12 22 . 9 days 16.5 days 



16.0 days 



Average 19.4 days. Average 15. 1 days 



A comparison of these two columns shows a remarkable difference 

 in the molting periods. In every series the molting periods for the 

 non-regenerating lobsters are shorter, and excepting Cg are much 

 shorter than the periods for the regenerating specimens, so that the 

 averages for the columns representing these two classes, respectively, 

 are 15.1 days and 19.4 days. In other words the average length of 

 the molting periods for all the non-regenerating lobsters in series 

 C4 to 0^3 w^ere shorter than the corresponding average period for 

 the regenerating individuals by as much as 4.3 days, or over 22 per 

 cent. 



In order to obtain a better conception of the relation of these 

 results to each other and to the normal molting period, the averages 

 for series B and series C4 to C^g have been graphically represented in 

 Chart IX. The heavy black line crossing the figure slightly below 

 the center represents the average normal molting period obtained 

 from the 42 control lobsters in series B. 



The figure as a whole has been vertically divided into 10 equal 

 sections, and beginning at the left each successive section corre- 

 sponds to one of the 10 groups in series C4 to C^g. The heavy 

 discontinuous line represents the regenerating individuals, while 

 the dotted line indicates the non-regenerating individuals in each 



