94, PROCEEDINGS OF SOCIETIES. 
again occurs, until peripheral fibres as fine as the central compo- 
nent fibres result.* 
Although it may be premature to devise diagrams of the actual 
arrangement, if I permit myself to attempt this, I shall be able to 
express the inferences to which I have been led up to the present 
time in a far more intelligible manner than I could by description. 
But I only offer these schemes as rough suggestions, and feel sure 
Fig. 4. 
Diagram to show the course of the fibres which leave the caudate nerve- 
cells. a, a are parts of two nerve-cells, and two entire cells are also repre- 
sented. Fibres from several different cells unite to form single nerve- 
fibres, 4, b, 6. In passing towards the periphery these fibres divide and 
subdivide; the resulting subdivisions pass to different destinations. The 
fine fibres resulting from the subdivision of one of the caudate processes of 
a nerve-cell may help to form a vast number of dark-bordered nerves, but it 
is most certain that xo single process ever forms one entire axis-cylinder. 
that further observation will enable me to modify them and 
render them more exact. The fibres would in nature be infinitely 
longer than represented in the diagrams. The cell below (fig. 5) 
may be one of the caudate nerve-cells in the anterior root of a 
spinal nerve, that above 8, one of the cells of the ganglion upon 
the posterior root, and a, the periphery. I will not attempt to 
describe the course of these fibres until many different observa- 
tions upon which I am now engaged are further advanced, but I 
have already demonstrated the passage of the fibres from the 
ganglion-cell into the dark-bordered fibres as represented in the 
diagram. 
The peculiar appearance I have demonstrated in the large 
caudate cells, taken in connexion with the fact urged by me in 
* “ General Observations upon the Peripheral Distribution of Nerves,” 
my ‘Archives,’ ili, p. 234. Distribution of Nerves to the Bladder of the 
Frog,” p. 248. ‘ Distribution of Nerves to the Mucous Membrane of the 
Epiglottis of the Human subject,” p. 249. 
