700 A. Ff. Goldfarb 
segments. Time, 35 days. The cord has grown still farther 
forward from the 8th to the beginning of the 5thsegment. Even 
more clearly than in the preceding, the disappearance of the large 
nerve cells near the broken end of the cord and the forward growth 
of nerve cells and fibers are seen. ‘The nerve cells collect in each 
segment to constitute primitive ganglia, Fig. 19. Anteriorly the 
cord ends in a mass of connective-tissue fibers. In none of the 
Fig. 19 Longitudinal section. Later stage in regeneration of nerve cord. Cord has grown from 
old cord anteriorly 34 segments. No evidence of contribution from ectoderm. Head not regenerated. 
preceding cases is there any evidence of cord formation from the 
amputated end. The growth took place entirely from the old nerve 
cord. 
No. 1.1. Amputated 3 segments, extracted the cord from the 
next 5 segments. ‘Time, 50 days. 
Regeneration of the new cord anteriorly has progressed even 
