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protoplasm. This is, for instance, very distinctly visible in fig. 37, 
as weli as in fig. 38, A. I have examined a great many cells having 
quite similar appearance, but in them all I found the same relation 
between the protoplasm and the contents of the nervous process. 
Although the contents of the process is often surrounded by a lightly 
stained mass at its entrance into the cell, it can, however, be seen 
passing to the mesial deeply stained protoplasm (cmfr. fig. 37 and 38), 
without giving off tubes to the light mass, it having an undivided 
course for a shorter or longer distance into the protoplasm. In this 
course it is, as described above, distinctly visible, and is surrounded 
by thick spongioplasmic fibres (fig.s 37, sf \ fig. 38, sf). At some 
distance from the entrance, the primitive tubes constituting this 
process-contents spread, and are lost in the protoplasm of the 
ganglion cell; generally, I could, however, trace some of them for 
some distance in their course through this deeply stained protoplasm.^) 
To explain vvhat relation there may be between the primitive 
tubes of the nervous process and the peripheral masses of primitive 
tubes in these cells is, of course, an extremely difficult matter. In 
fact, I have not been able to trace out the connection between them. 
We have, as mentioned, found every transition-form of ganglion 
cells, from cells in which the contents of the process is spread at 
once on its entrance into the cell (fig. 26), to cells where the contents 
of the process passes undivided, and distinctly marked for a longer 
or shorter distance into the protoplasm (fig.s 25, 28, 29, 37, 38) and 
afterwards is uniformly broken up and spread in the protoplasm (fig.s 
37, 38) or is to a greater or smaller extent broken up into bundles of 
primitive tubes (fig.s 25, 27). We have also found every transition- 
form, from ganglion cells having a protoplasm v/hich is uniformly 
deeply stained in the mesial part, and the slaining of which gradually 
passes over into a lighter one towards the peripheral layers (fig. 26), 
to ganglion cells with a protoplasm which is deeply stained in the 
'') Sections similar to those illustrated in fig. 37 or fig. 38, A, can certainly 
very easily give rise to a belief in nuclear processes. If one had a little pre- 
disposition to find nuclear processes, one could easily, for instance, in fig. 38. A 
combine the process with the nucleus, and suppose the reason why this connec- 
tion was not seen in the section was, that the section had not been quite successful. 
I think, therefore, that the description of nuclear processes can to a great extent 
be ascribed to processes like those I have illustrated, which seen in isolated cells 
can of course, in a still higher degree, give the appearance of being connected 
with the nuclei. Krieger has already made the same supposition regarding those 
peculiar processes described by him, and which are, in my opinion, processes 
originating in somewhat similar way as here described (^cmfr. fig. 23, A & fig. 25). 
