Influence of the Nervous System 705 
the reverse direction. The cord appears in some cases to have 
met midway between the old cord and the amputated end. Later 
a Savane Fer hy 7 a ie % 
hc oa aahetlal x ‘ are 
42 
bok oh 
eh 
Ve 
Fig. 20 Longitudinal section. Shows (1) anterior growth of the new from the old nerve cord; (2) 
development of cerebral ganglia and commissures in new head; (3) absence of nervous tissue in inter- 
mediate segments. 
Fig. 21 Longitudinal section. Cerebral ganglia in regenerated head connected with the old nerve 
cord. It is very probable that new cord has grown posteriorly as well as anteriorly. B, regener- 
ated cerebral ganglia; R,’ regenerated nerve cord; S, sheath surrounding old cord only. 
changes completely obscure the early steps in the formation of a 
continuous cord. 
In the following individuals the regenerated cords are very much 
