BI 
601 
Fig. 5 the leg had been cut off between the second and third seg- 
ments. The crab had moulted, so that the new parts are larger, but 
not full size. The consistency and color of the two distal segments, 
as well as their smaller size, show that this part of the leg has been 
formed a new'). In all the preceding cases the first walking leg of the 
right side had been operated on. In addition to these successful cases 
there were three others in this series, one regenerating at the same 
level as in Fig. 2, another as in Fig. 3, and the third as in Fig. 4. 
In another series the same leg had been cut off between the third 
and fourth segment, as shown in Fig. 6 A, and had regenerated the 
missing three segments, which are, however, smaller than the normal 
ones as shown by comparing them with the same segments of Fig. 6 B, 
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which represents the corresponding normal leg of the other side of the 
same crab. In this same series the first, or chelate legs of other 
individuals were operated upon. Fig. 7 represents one of these in 
which the distal parts are regenerating. The leg is the larger of the 
first two. The new bud arises from the middle of the large cut- 
surface. The leg had been cut off between the fourth and fifth seg- 
ments. In the same figure there is seen (near the base to the right) 
the wound made by the scissors in cutting the muscles. The next 
figure, Fig. 8, shows a new bud arising from the base of the segment 
that forms the distal boundary of the breaking-joint of this leg — 
the smaller of the first pair. The leg had been cut off through the 
1) There is a danger to be guarded against, viz. that the stump of 
the leg may be thrown off, despite the first operation at the breaking- 
joint, and regenerate from the breaking-joint. 
