88 



CHARLES BROOKOVER 



five fibers in the nervus terminalis at this age at the point where 

 it joins the olf actor}' bulb, although there are not less than two 

 hundred and fifty ganglion cells peripherally at this time. The 

 maximum number of fibers at this point in the adult as shown by 

 the Cajal process, which is supposed to show all the fibers of a 

 given kind, did not exceed forty. Herrick ('09) and Sheldon 

 ('09) traced the nervus terminalis posteriorly into the anterior 



A^Thirme H.U 



Fig. 21. Cajal preparation cut perpendicularly to the median surface of the 

 olfactory bulbs of adult Amia, 15 micra thick. Shows what were thought to be 

 fibers of the nervus terminalis at a, and ganglion cells at 6. Supporting elements 

 on the median surface of the bulbs at c. X 444. 



commissure, but the bundle is diffuse in Amia and has not been 

 traced into the commissure as yet. 



As noted in an early part of this paper, Allis traced aroot of the 

 nervus terminalis posteriorly ventral of the prosencephalon to the 

 region of the optic chiasm, but I failed to find it in gross dissec- 

 tions. However, I have frequently found a bundle of non-medul- 

 lated fibers accompanying the internal carotid artery of each 



