REPORT OF COMMISSIONERS OP INLAND FISHERIES. 



93 



"breaking plane/' and at the levels Idb., 2db., and the joint between 

 the fourth and fifth segments. (See Fig. Ill, Plate XXII, Idb, 2db, 

 3.) Eleven regenerating structures were obtained, seven from the 

 level Idb and four from the joint. Plate XXII, Fig. VI., shows 

 the second right leg regenerated from the level Idb, or the middle of 

 the propodite. This claw and half segment were restored at the next 

 moult, which occurred two months and eleven days after mutilation. 

 It will also be noted that the renewed structure is proportionately 

 much smaller than the normal size. 



The above data may be tabulated as follows : 



Table I. 



From the table it may be seen that one-fifth of the appendages 

 were restored from levels below or inside the breaking plane and 

 nearly one-third were renewed at levels distal to the same plane. 



These results show that the thoracic appendages may regenerate 

 from levels either distal or proximal to the breaking plane. The 

 comparatively larger per cent, of restorations from the distal levels 

 also indicate that the regenerating power varies at different regions 

 in the limb. 



While the experiments just described were in progress observa- 



