THE CERVICAL SYMPATHETIC TRUNK 329 
cells provided with both kinds of dendrites. While such a classi- 
fication facilitates description it must not be supposed that these 
types are separated by sharp lines of cleavage or that there is 
any reason to assign them different functions. 
In pyridine silver preparations of the superior cervical ganglion 
of dogs and cats the dendrites have not been very well stained. 
We could find only extracapsular dendrites, but could trace 
none of them to their termination. Figure 12 gives an idea of 
how they look when freed from intercellular axonic ramifications. 
In order to make an intelligent analysis of the functional con- 
Fig. 7 Cell with long extracapsular dendrites from the human superior 
cervical ganglion. Pyridine silver. > 400. 
nections in the ganglia it is necessary to have a clear idea of the 
course and termination of these extracapsular dendrites. 
Concerning the true endings of these dendrites our preparations, 
which could not be made very thick, give us no information 
because all the long dendrites seem to be cut off at the surface 
of the section. According to Cajal (711), there are three ways in 
which these long intracapsular dendrites in the human superior 
cervical ganglion end: 1) They may run into a fascicle of 
dendritic fibers where they run parallel to the other fibers of the 
fascicle and within which they may end with long interstitial 
appendages. At other times they end in olive-shaped extremities, 
or in fusiform swellings which give rise to fine varicose branches. 
