1895 - 96 .] Mr F. J. Cole on Nerves of Chimcera monstrosa. 53 
The buccal nerve, which accompanies the main trunk of the Yth 
for some little distance in the orbit, but is easily separable from it, 
divides into inner and outer buccal trunks, and innervates the 
sensory canals lettered B, B 1 , and B 2 in the figure (marked by dots), 
and terminating in inner and outer buccal groups of ampullae. 
The latter group differs from the others previously described in 
that the ampullae are much smaller, being, in fact, only about half 
the size of those in the superficial ophthalmic and inner buccal 
groups. 
The hyomandibular and facial proper arise from the medulla by 
a common ventral root, which, however, receives dorsal fibres from 
Diagram to show innervation of the sensory canals (indicated by different 
kinds of shading). 
SO, supra- orbital canal (cross-hatched) ; B, B 1 , and B 2 , infra-orbital canal 
(dotted), supplied by the main trunk, and the inner and outer buccal nerves 
respectively ; P, profundus portion of supra-orbital canal (black) ; H , hyo- 
mandibular canal (black) ; L, lateralis canal (oblique shading) ; M , mouth ; 
0, opercular fold. 
the root of the buccal ; whilst in the cranium it expands into the 
large hyomandibular ganglion, and immediately after gives off 
palatine and. chorda tympani branches, the root of the former con- 
