VESICULAR OR GANGLIONIC NERVE-SUESTANCE,. 77 
more prolonged extensions ; and as these when single re- 
semble tails, and when multiple are like the rays proceeding 
from a star, the cells are said in the first case to be “caudate,” 
Fig. 23.—VeEsicuLarn NERVE-SUBSTANCE. 
A, combination of Ganglion-cells (of which one is shown separately at az, more highly 
| magnified), and Nerve-fibres in the grey substance of the brain, which is also 
? traversed by a capillary vessel, 6; BB, Ganglionic cells with caudate pro- 
longations. 
is 
and in the second to be stellate (8). These prolongations 
have been traced into continuity, in some instances, with the 
axis-cylinders of nerve-tubes, whilst in other cases they seem 
to unite with those proceeding from other vesicles. It is not by 
any means certain, however, that the nerve-tubes thus connect 
themselves with the nerve-vesicles in all instances ; since it 
frequently appears as if the former passed in among the 
r, without coming into direct continuity with them. 
metimes a ganglion-cell seems to lie in the course ofa 
ibular fibre, which enlarges to envelope it, and then con- 
. again to its former dimensions. There can be no 
reasonable doubt, however, that in some way or other the 
Merve-fibres and the nerve-vesicles come into some kind of 
ninunication in the ganglionic centres. The vesicles are 
