330 S, W. RANSON AND P. R. BILLINGSLEY 
2) They may end in glomeruli where they encounter the branches 
of other dendrites of the same kind. As indicated in his figures, 
such glomeruli are located at a distance from the cells of origin 
of the dendrites concerned. 3) They may end in pericellular 
baskets. These dendritic baskets have been found in animals 
by Cajal (11), Van Gehuchten (’90), Sala (92), and Michailow 
(11), and will be discussed more in detail in connection with the 
account given by the latter author. 
Michailow (’11) has enumerated nine types of cells in the sym- 
pathetic ganglia of mammals. This grouping like that of other 
authors is chiefly of value as an aid to description, since there 
is no evidence that any one type is responsible for a particular 
function. From among the various forms, which, according to 
him, the dendrites of the cells in the sympathetic ganglia may 
assume, we have selected five as the most typical and significant. 
Such dendrites may be found in the ganglia of the sympathetic 
trunk as well as in the collateral and terminal ganglia. ‘They 
are represented in figure 8. 
1. Dendrites ending in a brush formation (fig. 8, a). These are 
given off insmall numbers (1 to 4) from Michailow’s Type II cells. 
They run between the cells of the ganglion where some of them 
end; others enter bundles of fibers that leave the ganglion. He 
has followed such a dendrite from a ganglion of the solar plexus 
of the horse and seen it run as a typical unmyelinated fiber into 
another ganglion of the same plexus. These dendrites end in 
special formations in the shape of little brooms, consisting of 
numerous end branches beset with enlargements. These thick- 
enings are of various shapes and sizes. Usually they are flattened 
and have the appearance of end plates or of large varicosities. 
2. Dendrites terminating in end plates (fig. 8, 6). These are 
given off from Michailow’s Type III cells. They begin as rather 
thick processes which in unipolar and bipolar cells may be so 
thick that it is hard to tell where the cell body ends and the 
dendrite begins. Sometimes these dendrites end in the same 
ganglion, sometimes they join bundles of nerve fibers and either 
end in them or run with them to end in other ganglia. Some 
remain thick and coarse to their end, others branch and become 
