THE CERVICAL SYMPATHETIC TRUNK 353 
illustrated diagrammatically in figure 15, c. The ending of den- 
drites of one cell in the immediate neighborhood of another cell 
has been observed by a considerable number of investigators. 
Such endings occur in a variety of different forms which can 
scarcely be accidental. A dendrite may end by forming’ a 
pericellular basket about another cell as seen ingfigure 8, d. 
Such formations have been seen by Cajal (11), Dogiel (95), 
Fig. 15 Diagram Thanet three ways by which one preganglionic fiber 
may come into relation with two or more postganglionic neurones. a, pregan- 
glionic fibers ending in a tricellular glomerulus in connection with the dendrites of 
three neurons; 6, a preganglionic fiber branching to form two pericellular 
plexuses; c, a preganglionic fiber ending in connection with the cell body of one 
neurone and the dendrite of another which is applied to the outer surface of the 
capsule of the first neurone. 
Michailow (711), and others. According to’ ‘Dogiel, ‘such dendritic 
baskets are always extracapsular. It is obvious that such forma- 
tions cannot serve to transmit impulses from one sympathetic 
ganglion cell to another unless we are prepared to admit excep- 
tions to the law of the dynamic polarity of neurones. But 
even then the capsule would be interposed between the nerve 
cell and the surrounding dendritic nest. So characteristic an 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 29, No. 4 
