Kinespury, Columella Auris and N. Factalis. 331 
Os articulare (angulare ?), while in Amphiuma,' (’02, KinesLey), 
Desmognathus and Spelerpes, Amblystoma, Salamandra and 
Triton, (CoGHILL, op. cit., p. 269), it occupies such a canal. 
In Necturus, Proteus, and Amphiuma (KINGSLEY) it does not 
anastomose with the Vth, while in the other forms it does. 
From the above relations it is seen that the only nerve 
which can be considered as a homologue of the chorda tympani 
is the Ramus mandibularis internus VII which goes to the mu- 
cous membrane of the floor of the mouth between the hyoid 
and mandibular arches.” This, of course, is the homology 
already advanced by Gaurp,* Srrone! and others, Gaupp from 
morphological relations, SrronG from the character of the fibers 
and their destination. AtLtis,° HERRICK® and GREEN’ have since 
seen reason todoubt the homology on the grounds of the pre- 
trematic position which the homologue of the chorda tympani 
must have, the nerve identified by them as R. mandibularis 
internus facialis being a post-spiracular nerve, and a Ramus facialis 
pretrematicus being chosen by them as the homologue of the 
chorda tympani. 
192, KINGS).EY, J. S. The Cranial Nerves of Amphiuma. T7/ts College 
Studies, No. 7, pp. 293-321. 
2 RUGE (op. cit., p. 294) recognizes this nerve as the chorda tympani though 
he does not identify it as the internal mandibular (alveolaris, FISHER) but seems 
to find that also present as a cutaneous nerve. COGHILL (op. cit.) regards it 
as a homologue of the chorda tympani. 
393, Gaupp, E. Beitrage zur Morphologie des Schidels. I. Primordial 
Cranium und Kieferbogen von Rana fusca. Morph. Arbetten herausg. VON G. 
SCHWALBE, Bad. II. 
4°95, STRONG, O. S. The Cranial Nerves of Amphibia. A Contribution 
to the Morphology of the Vertebrate Nervous System. Journ. of Morph., Vol. X- 
5’97, ALLIs, E. P. The Cranial Muscles and Cranial and first Spinal 
Nerves in Amia calva. /ourn. of Morph., Vol. XII, No. 3, 1897. 
6 99, HERRICK, C. J. The Cranial and First Spinal Nerves of Menidia ; 
a Contribution upon the Nerve Components of the Bony Fishes. /Journ. Comp. 
Neurol., Vol. 1X, 3-4. 
7‘o0, GREEN, H. A. On the Homologies of the Chorda Tympani in 
Selachians. /Journ. Comp. Neurol., Vol. X, 4- 
