210 JourRNAL OF CoMPARATIVE NEUROLOGY. 
(98, p, 223) describes this muscle in Silurus glanis, where its 
occurrence is much as in Menidia. He does not mention its 
innervation. JuGE (’99, p. 42) describes it for Silurus with a 
slightly different mode of origin under the name ‘‘musculature 
céphalo-scapulaire’’ (or better ‘‘élévateur claviculaire’’), and 
states that it is innervated by ‘‘a branch arising from the 
pharyngo-intestinal trunk of the vagus.”’ 
2. Ramus cutaneus dorsahs vagt. 
The ganglion of the general cutaneous root of the vagus 
(jugular ganglion) lies, as usual among the teleosts, within the 
vagus foramen. It is quite large and occupies the cephalic as- 
pect of the root complex. The peripheral fibers arising in this 
ganglion enter, for the most part, the r. cutaneus dorsalis vagi, 
running out of the foramen in the most caudal and dorsal part 
of the root complex closely following the lateralis root. Turn- 
ing sharply dorsally they cross the dorsal surface of the r. in- 
testinalis, and receive a twig from the lateralis ganglion destined 
for the third organ of the main lateral line canal. After sepa- 
rating from the vagus complex this nerve runs up around the 
parotic process of the cranium and at its outer angle breaks up 
into numerous branchlets for the skin of the occipital region, 
one of which runs down into the operculum. This latter 
branch is the r. opercularis vagi, supplying the lining of the 
caudal part of the operculum. None of the fibers of the r. 
cutaneus dorsalis vagi were traced to terminal buds, pit organs 
or other special sense organs. Its composition is therefore 
typical as compared with other teleosts, viz., general cutaneous. 
From the jugular ganglion a delicate nerve passes directly 
dorsal in the meninges around the oblongata. It reaches the 
dorsal surface of the brain at about the level of the exit from 
the cranial cavity of the r. lateralis accessorius, and farther 
mesially, and I at first thought that it was a slender vagal root 
of the latter nerve, as its origin is similar to that of this nerve 
in Gadus. This, however, appears not to be the case, for it 
not only arises from the general cutaneous instead of the com- 
munis ganglion, but in no case could it be traced into the r. 
