168 J. B. JOHNSTON, 
the above interpretation of VAN GEHUCHTEN’s results. The nucleus 
funiculi et trigemini spinalis is not impregnated in these preparations. 
Kinesspury’s (97) description of the nucleus funiculi in Amia 
is as follows: “ As the oblongata is approached the dorsal horns 
enlarge, gaining a size three or four times that characteristic of 
the myelic portion ... The larger part of the dorsal fibres dis- 
appear and just caudad of the metatela a concentration of fine 
fibres on the dorso- und ventro-lateral sides of the cornua mark the 
first recognizable appearance of the spinal V tract. At this level 
the dorsal cornu and the gelatinosa rapidly disappear.” 
I think it is evident that the nucleus funiculi et trigemini spi- 
nalis is equivalent to the nuclei of GoLL and BurpacH and the 
tubercle of RoLANDO in man. The fibres from this nucleus have 
never been traced in fishes, but is to be presumed that they join 
the internal arcuate fibres of which I shall speak in the next section, 
on the acusticum. The existence of a spinal VIII tract, composed 
of VIII and lateral line root fibres and ending in part in the same 
nucleus with the spinal V, indicates a close connection between the 
general cutaneous and the special cutaneous systems. 
2) Tuberculum acusticum. 
MAYSER (81) describes the acusticum in Cyprinoids as composed 
of small cells except in the neighborhood of the VII root (his 
V. gen. dors.), where there are large cells with unusually long den- 
drites. He describes the lateral line X nerve as a posterior VIII 
whose fibres turn forward in the acusticum as described by STAN- 
NIUS. MAYSER proposed to regard the lateral line organs as ac- 
cessory auditory organs. The anterior VIII as described by MAYSER 
probably includes the lateral line VII, which he has been unable 
to distinguish from the VIII. The fibres of this root spread through- 
out the tuberculum acusticum and probably reach the cerebellum. 
The latter point he was not able to determine because the acusticum 
goes over imperceptibly into the granular layer of the cerebellum. 
In addition, he describes three sets of arcuate fibres formed from 
the VIII root, two of which certainly go to the other side, while 
the third probably does so. He is unable to determine the place 
of ending of these arcuate fibres, and is in doubt whether to consider 
them VIII root fibres, since he can not believe that VIII fibres 
could come from the base of the medulla. I have stated that these 
arcuate fibres probably arise from cells in the acusticum. The 
