138 Journal of Comparative Neurology. 



peripheral ganglia. "The sympathetic neurones, the cell bodies 

 and the dendrites of which are grouped to form the sympathe- 

 tic ganglia, thus become the terminal links in a neurone chain, 

 of which the second link is formed by a neurone, the cell body 

 of which is situated in the cerebro-spinal axis and the neuraxis 

 of which leaves the spinal cord or medulla through the anterior 

 or lateral root as a small medullated fiber — white ramus or pre- 

 ganglionic fiber — which fiber ends in intracapsular pericellular 

 baskets, enclosing the cell of the terminal — the sympathetic 

 neurones," as I (6) have elsewhere expressed it. The neuraxes 

 of sympathetic neurones terminate either in involuntary muscle, 

 — non-striated and heart muscle, — in gland cells, on the den- 

 drites of other sympathetic neurones, or in the posterior root 

 gangha. The neuraxes of the motor sympathetic neurones 

 terminate after repeated division on the non-striated or heart 

 muscle cells. Before termination the neuraxes interlace to form 

 the intricate primary, secondary and tertiary plexuses of non- 

 medullated, varicose nerve fibers always found in involuntary 

 muscles when successfully stained either with gold chloride, 

 chrome silver or methylen blue. In all involuntary muscles, 

 whether in the heart, intestinal canal, respiratory organs, uterus, 

 bladder, ducts of glands, blood and lymph vessels, etc., I be- 

 lieve the motor supply to be as above given. Neither do I pos- 

 sess observations which would lead me to think that other than 

 motor sympathetic neurones take part in the formation of the 

 terminal meshes of the above mentioned plexuses. It is evi- 

 dent, therefore, that the nerve cells and nerve fibers described 

 by Schultze (7), and which he regards as a sensory end-appara- 

 tus, have not been observed by me, neither, I may say, have I 

 seen any confirmation of his results by other observers. In 

 heart muscle we have essentially the same general arrangement 

 of the motor fibers. In glands, the neuraxes of sympathetic 

 neurones form plexuses around the gland ducts and epi- and 

 hypo-lamellar plexuses about the alveoli, the terminal branches 

 ending on the secretory cells of the alveoli. I have digressed 

 briefly from the immediate subject under discussion since it 



