546 



SUMNER L. KOCH 



thetic fibers which joined the nerve as it passed through the 

 cavernous sinus. No such communications from the sympa- 

 thetic system were seen in connection with the Ilird and IVth 

 nerves. Branches of the cavernous plexus, which on gross dis- 

 section could be seen to join the Ilird nerve, on microscopic 



M 



Fig. 2 Section of the abducent nerve of the dog, showing bundles of sympa- 

 thetic fibers, a, Pyridine-silver. Ocu. 0, Obj. 6. 



examination were seen to accompany the nerve for a short dis- 

 tance and again separate from it farther distalward, without 

 entering into intimate contact with its fibers. No communica- 

 tion whatever between the IVth nerve and the sympathetic 

 system was seen. 



