Art. VI J Herrick, Tttstf iH Fisfus, 5p 



known. This proves to be the recurrent branch of the facialis, 

 carrying communis fibers from the pfeniculate ganglion into the 

 trunk. The details of the peripheral distribution of these fibers 

 have not been fully worked out, but the main path in the gold 

 fish is as follows: 



The geniculate ganglion of the facialis is clearly separable 

 from all other ganglionic masses of the trigemino facial complex 

 and is composed of two portions each of large size, The more 

 dorsal portion corresponds to the greater part ol the ganglion in 

 other teleosts and distributes its fibers chiefly by way of the 

 infra-orbital trunk. The more ventral portion sends cephalad a 

 very large palatine nerve and caudad a still larger nerve which 

 represents morphologically, though not topographically, the r. 

 recurrens facialis of the siluroids, etc., or the facial root of the 

 r. lateralis accessorius as found in the cod. 



This nerve passes back along the lateral side of the great 

 auditory root, and at the level of the superficial origin of the IX 

 nerve it divides into several strands, one of which passes dor- 

 sally of the IX root, the others ventrally. TTicse latter, how- 

 ever, pass upward so as to lie, farther back, dorsally of all of 

 the vagus roots except that of the lateralis branch of the vagus. 

 All of these communis fibers now join themselves to the r, lat- 

 eralis vagi and, passing through the ganglion of the latter nerve, 

 both components enter the body of the fish bound up in a sin- 

 gle nerve trunk in which the fine communis fibers are for a time 

 completely surrounded by the coarse lateralis fibers. The com- 

 munis fibers go off in successive branches along with lateralis 

 fibers. The details of the distribution have not been worked 

 out, though I think it would not be difficult to do so with the 

 material at hand. It is highly probable that the communis 

 fibers are for the terminal buds sparsely distributed over the 

 skin of the body and that the terminal buds of the trunk are all 

 innervated from these communis fibers in the r. lateralis vagt, 

 just as the buds in the skin of the head are innervated by other 

 communis fibers from the geniculate ganglion of the facialis, an 

 arrangement substantially identical in morphological plan with 

 that of the siluroid fishes. 



