NERVUS TERMINALIS IN DOG AND CAT 



149 



in the brain cortex. This is due to three or four small filaments 

 that leave the nerve at intervals and apparently enter the brain 

 substance at different points along the course of the nerve. 



Upon microscopical examination of the vomeronasal nerves and 

 the nervus terminalis, which were dissected off and stained in 

 mass, there can be seen a small spindle-shaped ganglion composed 

 of about 200 cells causing an enlargement of the nerve shortly 

 after its fibers have separated from the vomeronasal nerves. 



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Fig. 2 Represents the median section of the head of a cat with the frontal 

 lobe of the brain, the nasal septum and mandible removed, showing the course 

 and termination of the nervus terminalis and its connection with the vomero- 

 nasal nerves. X li- 



Ganglion cells are scattered around the nerve and between its 

 fibers throughout the greater part of its course. Figure 3 repre- 

 sents a camera lucida drawing of a part of the nervus terminalis 

 proximal to the ganglion showing the distribution of these cells. 

 On a careful examination of the septal portion of the vomero- 

 nasal nerves within the nasal cavity a clump of nerve cells was 

 found on each of two of its seven filaments. They lie at the 

 side of the nerve and attached to it just dorsal to the vomero- 

 nasal organ. These ganglion cells cannot be the cell bodies of 

 the vomeronasal nerve filaments because it has long been known 



