368 OLIVER S. STRONG 
body. ‘These fibers are still seen in the section crossing from the 
left olivary nucleus, and their presence makes a striking contrast 
between the right side and the left where they are practically 
completely absent from the area between the left olive and the 
left restiform body. When it is considered that there is a 
moiety of left cerebellum present, it is evident that the olivo- 
cerebellar connection might, as far as conclusions can be drawn 
from this, be a completely crossed one and while there may be 
some uncrossed olivo-cerebellar fibers they must be relatively 
unimportant. It is evident also that the olives are connected 
at least as much with the cerebellar hemispheres as with the 
vermis, possibly more. 
It will be noticed that the left descending vestibular root is 
smaller than the right. This is due partly or entirely to the 
fact that the section passes farther below the entrance of the 
left than the right vestibular nerve. The asymmetry of the 
two medial vestibular nuclei seen in the figure would be due to 
the same cause. Whether there is any difference in size between 
the two vestibular nerves could not be very well determined. It 
is seen that the medial longitudinal fasciculi are equal. It will 
also be noticed that the right medial fillet appears larger than the 
left. 
A section through the entrance of the left cochlear nerve is 
shown in figure 10. The section also passes through the small 
left. cerebellar hemisphere. In this section the left restiform 
body is seen at its maximum size. An interesting feature result- 
ing from the lack of development of the left middle cerebellar 
peduncle is the partial exposure of the left trapezoid body. 
The trapezius fibers are seen issuing from the ventral cochlear 
nucleus, passing just caudad to the vestibular root and thence 
mesially near the periphery. Figure 11 shows a portion of the 
same, under a higher magnification, further cephalad. An 
aberrant pyramidal bundle (p. 366). is seen passing laterally to 
assume a position dorso-lateral to the olive farther caudad. 
Figure 10 shows still more clearly the interesting but unex- 
plained fact that the right medial fillet is larger than the left, 
the latter being about 80 per cent the size of the right. If it 
