OF DENISON UNIVERSITY 
59 
which we will consider, is the large nucleus of the seventh nerve seen 
at a. This nucleus occupies a ventro-lateral position and is quite large 
with fibres passing from the cells collected into definite fasciculi, 
which pass dorso-cephalad almost to the floor of the ventricle where 
they are united into two or three large, bundles and turn upon them- 
selves, forming the knee of the seventh nerve, seen in cross section, 
(Plate XVII, Fig. i, /, and Fig 2, b.) The cells of this nucleus are 
of the multipolar type, with numerous processes and large nuclei. 
They measure about .07 mm. in length with nucleus .01 mm. in diame- 
ter. A magnified view of a small portion of the nucleus is shown by 
Fig. 4, Plate XVL Fig. 6, of same plate shows at e, the position of 
the large fascicle of the seventh seen in cross section. 
Before leaving the eighth root, it is well to examine one more sec- 
tion taken farther towards the cephalad margin of the root. Plate 
XVII I, Fig, I, at represents the entrance of the fibres, with the 
root nucleus at b. In this section the restiform body has passed into 
the cerebellum to the vermiform process (Ranney), and the fibres of the 
eighth kre not here divided, but pass directly into Deiter’s nucleus and 
upwards into the cerebellum, while the internal nucleus is reduced to 
a very small cluster of small cells. That fibres of the eighth pass into 
the cerebellum is without question. We observe also at this level the 
nucleus of the sixth at d, and the forward .extension of the olivary body 
at e. , The formatio reticularis comprises the largest part of the section. 
Examining a section at the level of the entrance of the seventh, 
(Plate XVII, Fig. 2,) we are able to trace the large bundle of the sev- 
enth, through the formatio reticularis above and medianiy to the nu- 
cleus of the sixth, to its flexure or genu. In the same manner the 
path of the fibres of the sixth nerve are easily traced to their nucleus, 
on the floor of the ventricle. The cells of this nucleus are about 
.05 mm. in length and have their axes in the direction of the entrance 
of the fibres into the nucleus. (Plate XVII, Fig. 5.) The olivary 
body, e, is also present in this section as a nucleus on the ventral side 
of the. medulla, its cells measure about .02 mm. and have numerous 
processes which start abruptly from the cell, thus giving them an even 
outline in appearance under a low power There is a very evident 
decussation with its fellow of the opposite side. Fig. 2, Plate XVIII, 
gives a magnified view of these cells. 
The next section considered is taken at the level of the caudad 
margin of the fifth root, (Plate XVIII, Fig. 5.) The scale upon which 
