290 H. W. NORRIS 
in reference to the motor root, until it lies on the ventral border 
of the latter (figs. 34, 35). At this point there is a small mass of 
ganglion cells with which these lighter colored fibers appear to be 
related (VJIggc.). These ganglion cells are very sharply dis- 
tinguishable from the neighboring auditory ganglion cells in size 
and nuclear characteristics. With van Giesen’s picro-fuchsin 
they stain a deeper ruddy color than the other ganglion cells. 
They are grouped together in a peculiar fashion, different from 
the other ganglion cells of the geniculate, Gasserian or lateral line 
ganglion. They disappear as soon as the lighter tract closely 
joins the other fibers to enter the facial canal. Figures 36 and 37 
show some of the relations of this tract to other portions of the 
facial nerve roots and ganglion as seen in horizontal and sagittal 
sections. 
3. The ganglia of the VII-VIII complex 
From the points of exit of its fibers from the brain, the root 
of the lateral line portion of the seventh nerve extends anteriorly 
as a flattened band closely compressed between the brain and 
the ear capsule (figs. 13, 30-35). The exact destination of the 
fibers of the several rootlets could not be determined with the 
accuracy that was possible in Amphiuma. The root divides into 
a dorsal portion (VJT rlld.), continuing anteriorly into the dorsal 
lateral line ganglion, and a ventral portion (VJJ rilv.) which 
descends to join the auditory and ventral facial roots. From 
this ventral lateral line portion, shortly after the division, one 
or two small bands of fibers ascend to join the dorsal division 
(fig. 35, VII rlldv.). The dorsal lateral line ganglion (glld.), as 
previously stated, is situated dorsal to and confluent with the 
Gasserian ganglion. The auditory ganglion (gac.) has the shape 
and relationships which seem characteristic of Urodela. There 
is a posterior, somewhat cylindrical part (figs. 30, 31, 37) which 
passes into the ear capsule, supplying the sacculus, posterior 
semicircular canal, lagena and the macula neglecta. The fibers 
of the posterior dorsal rootlet, (2) above, of the auditory nerve 
seem to belong chiefly to this part of the ganglion. The anterior 
