90 



HUBER. 



EXPLANATION OF PLATE V. 

 Figs. 20-22. Sympathetic Ganglia of Birds. 



Fig. 20. From methylene blue stained section of one of the dorsal sympathetic 

 ganglia of chicken. A, medullated fiber, with node of Ranvier at x, at which 

 place is given off a non-medullated collateral branch, a, which terminates in two 

 pericellular plexuses ; n, a non-medullated, probably a sympathetic nerve, ending 

 on d, the dendrite of the sympathetic cell. 



Fig. 21. A portion of a section of a dorsal sympathetic ganglion of chicken, 

 given to show the arrangement of the multipolar cells and the " intercellular 

 plexus," formed by the dendrites, medullated and non-medullated fibers of the 

 ganglion ; b, pericellular plexus. The capsules of the sympathetic cells were not 

 stained, and therefore not shown in the figure. 



Fig. 22. Three sympathetic cells, with pericellular plexuses from dorsal gan- 

 glion of chicken. Methylene blue and alum carmine, a, neuraxis of nerve fiber 

 ending in pericellular plexus ; c, capsules of sympathetic cells. 



Figs. 23-26. Sympathetic Ganglia of Mammalia. 



Fig. 23. A portion of the stellate ganglion of dog. Methylene blue and 

 alum carmine, a, non-medullated fiber, collateral branch of pre-ganglionic fiber 

 ending in pericellular plexus ; b, fiber ending in pericellular plexus which is medul- 

 lated to within a short distance of the capsule. 



Fig. 24. Sympathetic cell from stellate ganglion of dog (methylene blue and 

 alum carmine), showing a more complex pericellular plexus with spiral fibers. 



Fig. 25. Sympathetic neuron from semilunar ganglion of the cat, methylene 

 blue staining, a, neuraxis ; d, dendrite ; c, non-medullated, probably sympathetic 

 fiber ending on dendrite at c'. 



Fig. 26. A portion of a section of semilunar ganglion of cat, methylene blue 

 staining, showing arrangement of sympathetic cells and " intercellular network " 

 formed by the dendrites of the sympathetic cells and the medullated and non- 

 medullated fibers of the ganglion. 



