REPORT OF COMMISSIONERS OF INLAND FISHERIES. 103 



which contain the power of reeonstructing the mechanism of the 

 limb. 



As a matter more of curiosity than of deliberate expectation that 

 such an exhaustion of the regenerative power would be possible, a 

 series of observations were made on young lobsters. Young lob- 

 sters were taken because in them the appendages are regenerated 

 much more quickly and thus offer a larger number of opportunities 

 to remove the limbs during the period in which the present obser- 

 A'ations were being made. The experiments were made upon the 

 right cheliped. The given cheliped was always removed when it had 

 regenerated and come out of the next moult. After each moult both 

 regenerated and normal limb were measured as carefully as possible 

 so as to determine the proportional gain of the new cheliped as com- 

 pared with the normal one. It was attempted to remove the given 

 limb immediately after each moult, so as to always allow the whole 

 period between two moults for its regeneration. The attempt was 

 also made in every way to keep all the conditions as uniform as 

 possible. 



The following table gives data on six of these lobsters : 



