14 F. L. LANDACRE 
placodal cells represent the special visceral portion of the ganglion 
while the remainder is general visceral. This placode is to be 
followed in detail later as well as similar cells in the IX and X, 
and will not be described more fully here. 
Two nerves arise from this ganglion. The truncus hyoman- 
dibularis arises from the ventral border of the ganglion about 
one-third of its length from the anterior end and runs ventro- 
laterally from its point of origin. 
The truncus hyomandibularis contains lateralis fibers derived 
from the ventro-lateral ganglion in addition to those derived from 
the geniculate. At the level of the floor of the pharynx it divides 
into two rami, the dorsal (ramus mandibularis) turning cephalad 
and the ventral ramus (ramus hyoideus facialis) running directly 
ventral. 
A second smaller nerve (the ramus palatinus facialis) arises 
from the anterior end of the ganglion and pursues the course 
usual in teleosts following the roof of the pharynx and oral cav- 
ity forward to the level of the olfactory capsule. It seems to 
be accompanied throughout the proximal part of its course by 
the motor trunk of the facialis which supplies the muscle adduc- 
tor arcus palatini and the relation of the two components at 
their exit from the ganglion is somewhat peculiar, in some series 
the visceral fibers having the appearance of entering the lateral 
line ganglion (ventro-lateral). In other series of the same age, 
however, one can trace the visceral component into the anterior 
end of the geniculate while the motor component passes further 
caudad and enters the ganglion from the ventro-mesial side where 
it joins the motor trunk running out with the truncus hyoman- 
dibularis. 
The ventro-lateral VII 
This ganglion (figs. 1 and 9), as I have identified it, lies on 
the mesial side of the anterior third of the geniculate, partially 
inclosed in a crescent shaped depression of the geniculate. This 
ganglion has a very characteristic appearance. The interior of 
the ganglionic mass is usually free from nuclei, all the cells being 
arranged radially with the small ends directed centrally (fig. 29). 
