288 Journal of Comparative Neurology, 



to it, yet distinguishable, leaving the ganglion caudad to join 

 the sympathetic chain on the vagus. In this I confirm the anat- 

 omical findings and morphological interpretation of Cole. 



12. The Ramus Lateralis Aecessorhis. 



The r. recurrens facialis, or facial root of the r. lateralis 

 accessorius, arises from the geniculate ganglion by three root- 

 lets, which will be designated as the first, second and third 

 rootlets, counting from behind cephalad. 



The first one is the largest and can be regarded as the 

 main root. It will first be described. From the extreme ven- 

 tral tip of the geniculate ganglion (which lies internal to and 

 ventrally of the ventral lateral line root) a large bundle of com- 

 munis fibers (Figs, i and 4, rcc. i) arises and curves around 

 the lower and outer side of the ventral lateralis root, running 

 directly dorsad along the outer face of the V + VII root com- 

 plex and along the inner side of the membranous ear. The 

 fibers arise mainly from cells in the extreme ventral tip of the 

 geniculate gonglion, but partly higher up from the cells of the 

 ganglion which border the inner face of the ventral lateral line 

 root. They are of exceeding fine caliber and delicate myelina- 

 tion, thus appearing paler than the other fibers of the complex. 



A smaller bundle of nerves arises from the ventral tip of 

 the geniculate ganglion a little farther cephalad than the first 

 rootlet. This is the second rootlet. Its course is similar to 

 that of the first (Figs, i and 5, ree. 2.). It runs cephalad a 

 short distance from the tip of the geniculate ganglion along 

 the ventral surface o\ the ventral lateralis root. The latter runs 

 cephalad to its foramen, then, while in the foramen, turns 

 sharply back to enter the truncus hyomandibularis. In the 

 caudal, or concave, surface of this curvature this second rootlet 

 turns abruptly dorsad just inside the hyomandibular foramen, 

 and crosses the outer surface of the intracranial portion of the 

 lateralis root just mentioned to lie in the angle between the 

 dorsal and ventral lateralis roots. Here it is joined by the third 

 rootlet and these two rootlets then run up to join the first 

 rootlet. 



