Hatal, Nature of the Pertcellular Network. 143 
structural element to be mentioned here, is the neuroglia fiber. 
These fibers are easily found with my stain, since it stains them 
an intense black, and also on account of their filamentous char- 
acter. They are distributed thickly around the nerve fibers, 
dendritic branches, blood vessels, etc., but their well-marked 
characteristics enable them to be readily recognized. 
Besides these structures just mentioned, together with 
blood vessels and neuroglia nuclei, there are left in the grey 
substance very important structures, the axone terminals or 
fine filaments which carry the neurosomes. These terminal fil- 
aments are extremely difficult to isolate from the surrounding 
tissue, since they stain very faintly. To meet this difficulty, it 
is necessary to examine first the neighborhood of the cell- 
bodies where, as a rule, a lymph space is formed surrounding 
the latter, and where also the axone endings alone occur. As 
we shall see from Fig. 1, a large multipolar cell is surrounded 
by the clear space where a large number of the terminals (Fig. 
I, 2) carrying the neurosomes are seen. A single bundle of 
the axone terminals in this drawing comprises a number of fine 
filaments which unite and run together. From this locality, if 
we trace the terminals toward the grey substance, the faintly 
stained bluish filaments containing neurosomes are distinguished. 
These are the terminals which we are trying to demonstrate. 
I have pointed out already in my previous paper (’03), 
that the motor cells in the spinal cord are densely surrounded 
by the terminals of the axones which form the so-called _peri- 
cellular network. The network just mentioned is well shown 
in Fig. 3. These terminals, as Figs. 1 and 3 show, come 
in contact with the cell-body where they form very com- 
plicated meshes. These meshes not only cover the whole sur- 
face of the cell-body, but also extend continuously along the 
entire course of the dendrites. As I have said already, in the 
substantia grisea, the cross and longitudinal sections of the 
dendrites cut in various planes and having different sizes, are to 
be observed. Some of the sections are so minute that they 
can be seen only with the highest powers. Even such spicules 
of the dendritic branches are surrounded by the meshes of the 
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