1888.] 91 [Stowell. 
1. A large ramus to the dorso-cephalic border of the G. inferius of the N. 
vagus (Fig. 2). 2. A small ramus to the adjacent sympathic ganglion 
(G. cervicale cephalicum, Fig. 1). 8. A branch to the plexus, some fibres 
of which are apparently traceable to the N. accessorius, in the second or 
large accession from that nérve to the vagus (Fig. 3). 4. A slender fila- 
ment (Fig. 4) to the auricular branch (Fig. Aur.) which joins the jugu- 
Jar ganglion of the vagus with the geniculate ganglion of the facialis. 
The auricular ramus crosses the ectal surface of the glosso-pharyngeus 
just peripherad of the G. ehrenritteri and receives the anastomotic filament 
from the G. petrosum at a point opposite the nerve-trunk (this filament is 
frequently broken in dissecting the plexus), These four rami are given off 
from the ental surface of the G. petrosum as a single trunk or as several 
closely apposed rami. 5. A large branch, the tympanic (Fig. Tym.) which 
lies in a fossa entad of the ectal bulla together with a branch from the sym- 
pathic. This branch divides in the fossa, into four ramuli, as follows: 
a. One (Fig. Pe. maj.) becomes one of the roots of the great superficial 
petrosal, which in turn is one of the roots of the vidian nerve. 6. A second 
(Fig. Pe. min.) is one of the roots of the small superficial petrosal and 
terminates in the otic ganglion. c. A third (Fig. Eus.) forms a plexus 
around the eustachian tube. d. The fourth (Fig. Pl. tym.) forms, with 
the sympathic, the tympanic plexus upon the ectal surface of the promon- 
tory, from which filaments are traceable to the fenestra rotunda and the 
F. ovailis. : 
Principal Rami.—Peripherad of the G. petrosum the nerve-trunk bends 
around the ventral surface of the ectal bulla and lies apposed to an arteri- 
ole, a ramulus from the A. occipitalis. 8 mm. peripherad of the ganglion 
it gives the first ramus of the trunk (Fig. car.), caudad to the plexus caro- 
tideus about the ectal origin of the A. occipitalis. 6mm. peripherad of 
this ramus, a branch is sent dorsi-mesad to the sphincter muscles of the 
pharynx (Fig. M. phar.)—this ramus seems to be the only distinctively 
muscular branch of this nerve ; filaments are also given to the M. stylo 
pharyngeus. It is through this ramus that the N. glosso-pharyngeus con- 
trols deglutition (the palatal branch, q. v., may possibly reach muscular 
fibre in the palatal region, corresponding to the M. palato-glossus, and the 
M. palato-pharyngeus. I have not satisfactorily identified these muscles). 
N. pharyngeus.—At the origin of the muscular ramus just described a 
large ramus, N. pharyngeus (Fig. Phar.), is directed ventrad and caudad ; 
this ramus, about 5 mm. peripherad of its origin, divides into two ramuli, 
the cephalic one (Fig. Pal.) is distributed to the pharynx in the palatal 
region ; the caudal ramulus forms a dense plexus (Fig. Pl. Phar ) with 
the pharyngeal branch of the vagus nerve (Fig. Phar. Vagus) upon the 
pharyngeal mucosa laterad of and adjacent to the epiglottis. 
A second pharyngeal ramus (Fig. Phar. muc.) is given off 10 mm. peri- 
pherad of the first ; this is distributed to the mucosa laterad of the base of 
the tongue. A third branch is given off about 5 mm. still peripherad, 
which unites in the pharyngeal plexus upon the mucosa. 
