52 OLOF LARSELL 



and the horse, as in the beef, may be easily seen with the unaided 

 eye. As shown in the figure, the left nerve had two compact 

 ganglia. The right nerve had a single ganghonic mass of larger 

 size. The larger of the two ganglia of the left nerve, which was 

 the one more rostrally situated (figs. 40 and ' 43) , was about 2 

 mm. long and ^ mm. in diameter. The smaller ganglion was of 

 about one-half the volume of the other. 



The peripheral ends of both nerves were frayed and had the 

 appearance of having been broken, doubtless where they sub- 

 divided into strands smiilar to those observed in the cat and in 

 the horse. The anterior ends of the olfactory bulbs had been 

 torn off in removing the brain from the cranial cavity, so it was 

 not possible to study the relation of the tenninalis to the vomero- 

 nasal nerves in this specunen. The main bundles of the nerve 

 lay outside the pia mater as far caudally as several millimeters ros- 

 trad to the ganglia. Here they pierced the pia and in their fur- 

 ther course centrally lay between this and the brain surface. 



Immediately caudal to the posterior ganglion of the left nerve, 

 and slightly more caudad to the single ganglion of the right nerve, 

 the main bundle divides into 'a number of strands or rootlets. 

 For convenience, the description will be confined to the left 

 nerve, but in all essential respects, unless indicated to the con- 

 trary, the same statements apply to the right nerve also. 



As shown in figures 40 and 43 the main trunk of the nerve is 

 formed by the union of three strands. Two of these, the mesial 

 one and the lateral (figs. 40 and 41), follow a course closely parallel 

 to two of the branches of the anterior cerebral artery, and give 

 off delicate rami to them. These twigs enter the walls of the 

 vessels in the same manner as has already been described in the 

 ox. 



The relation of the medial of the three roots to another branch 

 of the anterior cerebral artery is shown in figures 40 and 41 at a. 

 Figure 40 represents the left hemisphere of the brain as viewed 

 from the medial side. In figure 41 a portion of the same surface 

 is represented on a larger scale, as seen through the binocular 

 microscope. It will be noted that strand a turns so as to run 

 nearly at right angles to the main nerve bundle and follows the 



