NERVUS TERMINALIS IN AMIA 91 



undoubted nerve cell shown in fig. 12 near the nervus terminalis. 

 Golgi preparations of adult Amia show that there are branching- 

 nerve fibers along the arteries at the anterior end of the olfactory 

 bulbs (fig. 24), which are apparently derived from the nervus 

 terminalis. They are more numerous ventral of the olfactory 

 bulbs, but they have been found on every side of the bulbs and 

 oftentimes seem to arise from the bulbs or are following the 

 vessels to the very surface of the bulbs. There is a rich network 

 of vessels at the surface of the olfactory bulbs and injected Nissl 

 preparations, as well as Golgi impregnations, show that every 

 large mitral cell has an arteriole coursing along the surface of its 

 two or three main dendrites. 



Fig. 24. Golgi preparation cut sagittally from adult Amia. Shows nerve fibers 

 proceeding posteriorly from the position of the nervus terminalis, near where it 

 joins the olfactory bulb ventro-mesially. X 225. 



From the above description, from the findings of Allis, and 

 from the fact that Pinkus found the nervus terminalis running 

 far caudad ventral of the brain in Protopterus, it would not be 

 unnatural to infer that the nervus terminalis in Amia extends 

 caudad of the olfactory bulbs. However, we shall be in a better 

 position to judge of this matter after a description of certain 

 fibers found at all levels in the meninges of the prosencephalon of 

 Amia. 



