421 
The end-discs, as we may call the disc-like expansions, may terminate 
on the inner surface of the capsule, on or between the nuclei which 
are always found surrounding the axis cylinder while it is yet within 
the capsule, or, as would seem from Fig. 3, on the cell itself. In the 
latter instance there is usually found a clear zone of protoplasm sur- 
rounding the expanded end of the processes. 
Fig. 2. Fig. 3. 
Fig. 2. Spinal ganglion cell of Rana C. a axis cylinder; 5 secondary process 
ending in end-disc; c secondary branch dividing into three smaller branches; d secon- 
dary branches twisted about axis cylinder. 
Fig. 3. Spinal cell of Rana C. a, secondary branch dividing into three other . 
branches, each ending in an end-dise; 4, clear zone of protoplasm under end-disc. 
In preparations in which these cells were most successfully stained, 
these small secondary branches, as also the end-discs, were deeply 
stained with the methylene blue, and, especially in sections double stained 
with alum carmine, could their course and mode of ending be clearly 
discerned. 
In the preparation from which Fig. 3 was drawn, the portion of 
the cell represented in the diagram, the capsule and its nuclei, as 
also the nuclei within the capsule, were stained red with the carmine, 
and only the fine fibril, dividing into its three branches, and the three 
end-discs, were colored with the blue. There would seem however to 
be some difficulty in staining these structures, as often in preparations 
in which it would seem that all the nerve fibres of the ganglion were 
stained, only very few or none of the secondary branches can be found. 
