104 Journal of Comparative Neurology. 



lobular duct, and after a very short interruption a fiber of the 

 same size and appearance, and which seemed to be a direct 

 continuation of the axis cylinder just mentioned, could be traced 

 into a peri-alveolar — epilamellar — plexus. 



The meduUated fibers which enter the glands, do not, I 

 am inclined to think, enter into the formation of the epilamellar 

 plexuses, as Fusari and Panasci, and Korolkow have suggested. 

 MeduUated nerve fibers, of cerebro-spinal origin are undoubted- 

 ly found in glands, and have I believe two distinct modes of 

 termination. Some of these fibers are no doubt sensory, end- 

 ing in free endings between the columnar cells lining the gland 

 ducts. The free endings described by Arnstein (6i) and my- 

 self, {62) belong I believe to fibers of this nature. Other med- 

 uUated fibers end in baskets around the sympathetic cells, as 

 pointed out by the writer. These fibers will be given no further 

 consideration now, but will receive due consideration in one of 

 the following lectures. From what has been said, and es- 

 pecially if we extend our consideration to glands which in their 

 fully developed condition are not classed as tubular or alveolar 

 glands ; (we may refer here to work done by Berkley (63) on the 

 intrinsic nerves of the liver, who states that such nerves are 

 non-meduUated ; and t?he thyroid, where Anderson (64) and 

 Berkley (65) have shown that non-medullated nerve fibers enter 

 this gland with the blood-vessels, there to form peri-follicular 

 meshworks, the terminal branches of which end on the gland 

 cells (Berkley) ; and the supra-renal, worked on quite recently 

 by Dogiel (66) where he has shown that the intrinsic nerves are 

 non-medullated, in part neuraxes of sympathetic nerve cells 

 found in this gland) we may see that the general statement, 

 that gland cells are innervated by the terminal branches of the 

 neuraxes of sympathetic neurons, is based on abundant obser- 

 vation, even though we must say [with Arnstein (61), "That 

 many an eye will tire before the secretory nerve-endings will 

 in their true nature be fully understood." 



4. T/te ending of the neuraxes of sympathetic neurons in the 

 spinal ganglia. — The existence of sympathetic nerves in the 

 spinal ganglia is a point concerning which there exists as yet 



