38 H. BERKELBACH VAN DER SPRENKEL 
part of the gray matter (covered with crista) in which also fibers 
of the anterior lateral nerve terminate (figs. 16, 17). 
Laterally of the entrance of the lateralis posterior a group of 
cells is found (fig. 19) which extends (with slight interruptions) 
to the place of entrance of the nervus lateralis anterior. Caudad 
it is still found in several sections behind the lateralis posterior. 
The processes of these cells are directed in a medial direction. 
One might call this group the nucleus lineae lateralis (figs. 17, 
16, 15). The secondary fibers arising from the lateralis lobes 
are very numerous (fig. 15) and form a very big decussation in 
the dorsal part of the raphé, the same as in other teleosts but 
much larger (figs. 16, 17). 
Many of these fibers of the lobus lineae lateralis posterioris 
pierce through the underlying crista of the lobus lateralis anterior 
(fig. 17). The majority of these fibers ascend, after the decus- 
sation, in two separate bundles (fig. 15), which join farther front- 
ally (figs. 12, 13). Most of them, if not all, reach the torus 
semicircularis, which again is connected with the valvula of the 
cerebellum, especially with its lateral lobes, by the tractus cere- 
bello-mesencephalicus dorsalis. 
It is not my intention to deal with further details of the second- 
ary connections of the lateralis centers, but I mention this only 
to show that the considerable development of the valvula cere- 
belli in this animal does not depend on ‘taste,’ but on the great 
size of the lateralis nerves and their secondary and tertiary 
connections. 
In dealing with the vestibular nerve, I shall describe separately 
the course of its coarse and fine fibers. 
The coarse fibers*! of the VIII nerve enter the brain behind 
the nervus lateralis anterior. They constitute the most medial 
and most frontal part of the vestibular root and take a dorso- 
frontal course [fig. 20 (5)|. As a strong coarse-fibered bundle 
they pass along the lateral and: dorsal border of the spinal V 
tract (fig. 16) and end in the region of gray substance” that lies 
41 Outside the medulla oblongata they join the fibers of the nervus lateralis 
anterior. 
* This region lies beneath the fibrae arcuatae internae. 
