192 JOURNAL OF COMPARATIVE NEUROLOGY. 
the facial group (by which he means the hyomandibular nerve, 
the other facialis branches being relegated by this author to the 
trigeminus) he adds: ‘‘No portion of the facial nerve, so far as 
I have been able to trace, innervates any portion of the sensory 
canal system. As previously pointed out, the descending 
branch of the ramus oticus replaces the hyomandibular branch 
of the facial in the upper portion of the operculo-mandibular 
canal, while the lower portion is innervated by the ramus man- 
dibularis of the trigeminal, the mandibularis of the facial lying 
below it.”” The arrangements of the cranial nerves of A. catus 
are unquestionably similar in all essentials to those of A. melas. 
Further comment on the brief descriptions of this author will 
hardly be necessary. 
So far as observed no fibers from the truncus hyomandib- 
ularis reach the mucous lining of the mouth. In Ameiurus, 
therefore, as in Gadus, there is no nerve corresponding to the 
r. mandibularis internus VII, as in the tadpole of the frog 
(STRONG, '95), in Amia (ALLIs, ’97), in Menidia (Hrrricx, 
’99), in Lota (Goronowitscu, ’96), in some selachians (STan- 
‘NIuSs, 49 and GREEN, 1900) and in many other fishes. 
Io. Ramus palatinus posterior. 
The nerve which in Menidia and Gadus I designated as the 
7. pre-trematicus facials can be clearly identified in Ameiurus, 
though in a somewhat atypical form. This is the nerve named 
by Wricut (’84a, p. 367) the r. cutaneus palatinus (a most 
unfortunate term), and I confirm his description of its course. 
JuGE (’99, p. 69) describes it for Silurus under the name, 
‘“‘rameau de la muqueuse buccale.”” My reason for returning 
to the term, 7” palatinus posterior, which is devoid of morpho- 
logical implications, will appear below. 
It has an independent origin from the ventral edge of the 
geniculate ganglion (Figs. 2 and 6, ~ gt. V//) and closely 
associated with the origin of the communis fibers for the hyo- 
mandibular trunk. It leaves the cranium immediately cephalad 
of the hyomandibular trunk and runs down at once to the sub- 
mucosa of the roof of the mouth where it breaks up into numer- 
