332 S, W. RANSON AND P. R. BILLINGSLEY 
thin, take on the character of unmyelinated fibers and run out 
of the ganglion. The endings are in the form of plates of various 
sizes and shapes. ‘These may lie free in the connective tissue or 
may be pressed against the outside of the capsules of other cells 
so close as to produce an impression on the cells. Other end 
plates of this type are found in the fiber bundles outside the 
ganglia. Hefound great numbers of such end plates in the fiber 
bundles of the solar plexus. 
3. Dendrites ending in a number of fine branches with end 
bulbs closely grouped together as illustrated in figure 8, c. Such 
dendrites arise from Michailow’s cells of Type IV. They branch 
freely and occupy much space, greatly increasing the territory 
of these neurones. They may end in the same or in other ganglia. 
Near their termination they begin to divide di- and tricotomously. 
The branches are provided with terminal enlargements which 
may be rounded or pear-shaped. All the branches of a dendrite 
form together an end-apparatus, which may vary in size and 
appearance, but is always applied to the outer surface of the 
capsule of a cell of Type IV. That is to say, these fibers arise 
from cells of Type IV and end upon the surface of the capsules 
of other cells of Type IV. 
4. Dendrites forming pericellular nests (fig. 8, d). These 
arise from the cells of Michailow’s Type VI, are usually short, 
and divide repeatedly. The branches approach another cell, and 
anastamosing with each other form a network that encloses the 
cell. Sometimes such a basket-like network surrounds the cell 
from which the dendrite arose. Similar formations have been 
described by Dogiel, according to whom they are always extra- 
capsular. As already mentioned, Cajal, Van Gehuchten, and 
Sala have seen such dendritic nests. The significance of these 
structures can best be discussed in a later paragraph. 
5. Dendrites the branches of which anastomose to form a 
true net out of which a fine fiber, probably the axon, arises 
(fig. 8, f). One or more dendrites break up into a great number 
of fine branches which anastomose with each other, giving rise to 
a network. Out of the net fine filaments arise, which join to- 
gether to form a smooth fiber that remains unaltered as far as it 
