114 



REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



a "crusher" on the left and a "nipper" on the right. On July 26, 

 1905, both chelipeds, together with the second and third right walk- 

 ing legs, were autotomously removed. Soon after the limbs began to 

 regenerate a curious extra hud was observed on the regenerating 

 second right walking leg. The data obtained for this abnormal leg 

 is given in the following table: 



Fortunately, attention was attracted rather early to the extra 

 bud growing out from the regenerating leg. It became possible, 

 therefore, to learn something of the history of this abnormal limb, 

 and also secure several drawings at different stages of its growth. 

 We will describe, first, the development; and, second, the morpho- 

 logical characters of this regenerated leg. 



a. Development. 



The development of this regenerating leg, by days, was as follows: 



Thirty-fifth day. Fig. 10. — It was on the thirty-fourth day after 



mutilation that the abnormal regeneration was observed. In the 



drawing made on the following day (Fig. 11) it will be seen that in 



addition to the usual regenerating structure there is an extra process 



*This was, no doubt, caused by the limb accidentally rubbing against some obstacle as the 

 lobster moved about in the car. The injury consisted in brushing the extra bud abruptly 

 upward (Fig. 13) from the original position in which it was growing. 



