REPORT OF COMMISSIONERS OF INLAND FISHERIES. 115 



branching off from the third segment or carpopodite (c). This 

 abnormal bud takes its origin from the ventral surface of the carpop- 

 odite, but instead of growing upward in a normal direction it 

 makes an abrupt bend and hangs down. At this stage of the regen- 

 eration the outlines for all the normal segments except the basal 

 one are all clearly defined, and the groove (g) for the jaws of the claw 

 is well developed. The extra bud at this time also showed two 

 definite segments, 1 and 2, which apparently corresponded, respec- 

 tively, to the dactyl and propodite of the normal limb. 



Forty-third day. Figs. 11 and 12. — At this stage the basal segment 

 or ischiopodite (IS) is now also becoming differentiated. Observing 

 the abnormal bud more closely, a distinct longitudinal cleavage was 

 found in the tip of the propodite segment (2), which divided this 

 segment into tw^o equal parts, I'R' and I'L'. In the extra dact^i 

 there was only a slight indication of a similar bifurcation (g). In 

 size, the propodite of the abnormal bud was somewhat smaller than 

 the corresponding normal segment, the two segments measuring, 

 respectively, 6^ mm. and 7^ mm. The general color of the regen- 

 erating limb is now beginning to show a darker hue. In the preced- 

 ing stage it was characterized by a bright red or pinkish color, but 

 at the present stage dark blue pigments are developing at the joints 

 for the various segments. 



Forty-eighth day. Figs. 13 and 14. — On the forty-seventh day of 

 regeneration an accident occurred in which the abnormal bud was 

 mechanically displaced and thrown abruptly upward, so that it 

 assumed a position practically parallel with the distal extremity of 

 the normal limb. This displacement was probably the result of 

 striking against some obstacle as the lobster moved about in the car. 

 A wound or rupture (w) was at the same time produced at the union 

 of the extra bud with the normal limb, which was so severe that I 

 feared the abnormal bud would eventually become completely sepa- 

 rated from the limb and lost. But fortunately the wound healed 

 and the abnormal structures survived through the next moult. 



