170 
J. BEARD. 
avowed hypothesis “meriterait d’etre soumise a un controle 
rigoureux, par des recherches embryogeniques.” Iu face of 
the known facts concerning the morphology of the lateral 
nerve as detected by van Wijhe and myself, we may regard 
with perfect indifference M. Julin’s researches in the direction 
of the above hypothesis. Such researches will turn out to be 
neither more nor less than a wild-goose chase. 
In my statements that the whole of the so-called “ neural 
ridge ” passes over into the ganglionic formations, I agree 
completely with Sagemehl, Onodi, and His. Balfour and 
Marshall held different opinions which now can no longer be 
maintained. 
The ganglionic Anlage — now that it lies on the lips of the 
neural plate, seems often to possess an unpaired character, but 
from its subsequent fate, and from the appearances presented 
in such figures as my figs. 21 and 29, it must really be con- 
sidered as a paired structure, a point of the truth of which the 
lateral origin of the Anlagen is sufficient evidence. The 
Anlagen now begin to grow out from their position above and 
between the lips of the neural plate (figs. 22, 23, 33 — 36), and 
wander to their permanent position at the lateral portion of 
the spinal cord (figs. 8 and 30). 
We are now treading on ground which has been fairly 
worked, but there are none the less one or two points of extreme 
importance to which a few words must be devoted. As we have 
seen, until now the ganglionic Anlagen have really no attach- 
ment to the spinal cord ; and during the growth downwards to 
its lateral side they are, as Sagemehl (No. 56, p. 30) first showed, 
quite independent of that structure (fig. 57). The difference 
between Sagemehl’s account and my own is obvious when we 
remember that he, along with most other observers, regarded 
the ganglia as outgrowths of the spinal cord. I maintain — and 
the figures prove the truth of my view — that neither now nor 
before are the ganglia attached to the spinal cord. The first 
and only attachment to the spinal cord is the permanent one 
now soon to be acquired. Before the attachment takes place 
the ganglionic Anlage of each side divides into two portions. 
