GANGLIA OF RANA 467 
ganglion is heavily pigmented like the lateralis ganglion on VII 
and X. As to its relation to the lateralis ganglion of Strong’s 
plot, we are uncertain. As we shall show later, Strong has 
apparently overlooked one of the lateralis ganglia on X owing 
probably to the extent of the fusion of the IX + X complex. 
Since the lateralis [X may sometimes combine with the dorsal 
lateralis X, which is probably ganglion A of Strong’s plot, and 
sometimes with the dorsal border of ventral lateralis X, which 
seems to be absent as a distinct ganglion in Strong’s plot, it prob- 
ably corresponds to the ventral border of Strong’s ganglion A. 
This ganglion is composed, however, as Strong states, of two dis- 
tinct ganglionic masses, a general cutaneous, the ‘jugular,’ and 
a lateralis X. If it unites permanently with ganglion A, it is 
with the dorsal lateralis X. 
There is one nerve arising from this ganglion. It is quite 
small and pursues in a general way the same course as the auricu- 
laris X, being quite separate from it, however, throughout its 
whole course. It arises from the ventral and anterior end of the 
ganglion and runs forward around the border of the posterior 
end of the auditory capsule to reach the epidermis. It is applied 
very closely to the capsule and is, of course, displaced backwards 
by the later growth of the auditory capsule. This nerve corre- 
sponds to the ramus supratemporalis of Strong’s plot. The root 
of thisnerve is difficult to follow but seems to enter the brain along 
with the lateralis roots of X. From the ganglion it follows a 
course dorsally and posteriorly along the dorsal surface of dorsal 
lateralis X, where it seems to join the fibers of this ganglion (figs. 
1 and 2). 
THE VAGUS GANGLIA 
The vagal ganglionic complex consists of five more or less 
distinct ganglionic masses (figs. 1 and 2). With these is associated 
in position, as indicated in the preceding section, the lateralis 1X 
ganglion. These five ganglia fall into three well defined groups. 
First, the most dorsal and proximal portion consists of two ganglia; 
the dorsal lateralis (D.L.X.) and the jugular or general somatic 
(Cu.X.). Of these two, the dorsal lateralis is lateral in position 
and the jugular is mesial in position. They are of nearly equal 
