468 
the Zoologischer Anzeiger, No. 348, 1890. The same terms, for con- 
venience, are used. 
Attention is especially called to two paragraphs in this previous com- 
munication. “Thus the Hyomandibular consists of three components: one 
from the ventral root of the ventral VII (VII ab), coarse-fibred, one from 
the dorsal VII (VII b), coarse-fibred and sensory, and one ultimately 
from the Fasciculus communis (VII aa), fine-fibred and sensory. Un- 
fortunately the ultimate distribution of these parts is complicated by 
the fact that the Hyomandibular receives a communicating branch from 
the IX+X group. It would seem highly probable, however, that the 
Ramus mandibularis, which is fine-fibred and supplies parts of the 
oral cavity, derives its fibres from the Fasciculus communis component 
(VII aa). The dorsal VII (VII b) component must be regarded (sev 
below) as supplying cutaneous branches. From the joint nerve formed 
by the Hyomandibular and the communicating branch from the IX+X 
are also given off a number of motor branches. I believe these are, 
in part at least, supplied by the remaining component, i. e. VII ab, 
especially as this has the position and characteristics of a motor root”, 
(p. 3). “In some Urodele forms examined, the nerve VIIa + !/, VILb 
was seen to have two ganglia, one immediately below the Auditory 
ganglion and probably belonging to the Palatine (Fasciculus communis) 
portion and the other further outwards on the Hyomandibular. In 
Anurous forms examined, including Tadpoles, no ganglion cells seem 
to occur on the VII until its connection with the Gasserian gan- 
glion. This being the case, it is evident that the Gasserian ganglion 
in Anura is very complex, consisting not only of the ganglia of the 
Maxillo-mandibularis and the Ophthalmicus trigemini, but also of the 
Palatine and of the branches of the dorsal VII, as long as they per- 
sist” (p. 4). 
When Amblystoma was examined it was found that the relations 
were clearer than in the forms previously studied and simpler than in 
the Tadpole, on which the first account was mainly based. Consequently 
some of the points mentioned above, rather as inferences, could be 
verified by actual observation. In Amblystoma, as in other Urodela, 
the VII does not enter into such close relations with the V as it does 
in Anura. Only the dorsal division of the dorsal VII (VIIb) fuses 
with the dorsal side of the Gasserian ganglion. These conditions ap- 
proach more nearly those seen in Fishes. 
In Amblystoma the Fasciculus communis component of the VII, 
shortly after emerging from the medulla, enters a ganglion lying partly 
