122 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



The original chelee of this lobster were of the normal asymmetrical 

 type. The left claw (Fig. 24) was a completely developed "crusher/' 

 characterzied by the wide massive claws with an almost entire absence 

 of tactile hairs, and by the presence of broad tubercle-like teeth. 

 The right chela (Fig. 25) was of a characteristic "nipping" type, 

 with a relatively slender claw, pointed cutting teeth, and a fringe of 

 tactile hairs along the jaws. The right and left chelae measured, 

 respectively, 146 and 140 mm. in length. 



Soon after the amputation of these limbs another pair of chelae 

 began to regenerate from the remaining stump or basipodite. On 

 July 18, twenty-three days after the amputation, the regenerating 

 buds measured 5 mm. in length. By the time the segments of the 

 future limbs were well outlined, attention was drawn to the very 

 similar appearance of the two regenerating structures. Usually, as 

 the lobster approaches the culmination of the moulting period, the 

 regenerating chelae become so clearly differentiated that a distinction 

 between the "crusher" and "nipper" can often be readily detected. 

 In the present case, however, no characteristic differences could be 

 observed between the right and left regenerating buds, and, more- 

 over, the general morphological appearance of each was such that it 

 led to the prediction that both were developing into the crushing 

 type of claws. The correctness of this prediction was shown at the 

 next moult. 



After the lobster had moulted, the regenerated chelae resumed 

 their normal shape and both measured 63 mm. in length. Each 

 cheliped was very similar to the other in form, and displayed the 

 morphological characters of a true " crusher." All the other append- 

 ages were in a normal condition except the regenerated second right 

 leg, which had developed the triple claw previously discribed. 



Specinmi No. 9. Figs. 32-35. 



This specimen was an 8-inch male lobster. On August 4, 1906, 

 both chelae and the second left leg were autotomously removed. 

 As in the preceding case, the original chelae were of the normal 



