THE CERVICAL SYMPATHETIC TRUNK B yaa) 
dendrites usually contain pigment in large quantities and are 
sometimes vacuolated. Cajal (711) does not describe any sub- 
capsular dendrites in the sympathetic ganglia of animals, al- 
though they are very prominent in his descriptions and figures 
of these ganglia in man. But these dendrites were demonstrated 
in the human ganglia by means of his silver stain which was not 
used in his earlier studies on animals. 
It might be supposed that the use of the newer silver stains 
would demonstrate their general occurrence in the mammalian 
sympathetic ganglia, but in pyridine silver preparations of the 
superior cervical ganglia of cats and dogs we have seen no cells 
with subcapsular dendrites. This shows that they must be 
relatively rare here and establishes a very striking contrast 
between the superior cervical ganglion of man and that of the 
carnivora. 
The intracapsular dendrites reach their highest development 
inman. Here they give rise to complicated subscapsular forma- 
tions which were first described by Cajal (11), whose observa- 
tions have been confirmed by Marinesco (’06). Both investi- 
gators worked with the superior cervical ganglion stained by 
the Cajal method. Their observations are confirmed by our 
own observations on the human superior cervical ganglion stained 
by the pyridine silver method. The account which follows is 
based on our own preparations, but is in accord with the results 
of the two investigators who preceded us. The subcapsular 
dendrites are arranged in a great variety of ways underneath the 
capsule of the cell from which they take origin. In general 
they may be said to give rise to two types of complicated intra- 
capsular networks which Cajal has called dendritic crowns and 
glomeruli. 
Figure 4 furnishes a good example of a dendritic crown. 
Numerous dendrites of varying caliber come off from the cell 
and run toward the inner surface of the capsule where, with or 
without branching, they turn to run in the subcapsular space. 
Here they cross and recross, but do not anastamose, and form an 
open network more or less uniformly distributed around the cell. 
In some cases these dendrites can be seen to end in small bulbs 
