54 JOURNAL OF COMPARATIVE NEUROLOGY. 
According to my preparation the lateral and larger ‘‘acces- 
sory ramus’”’ arises, as Strong describes it, from the dorso-mesal 
portion of the Gasserian ganglion. It passes across the dorsal 
surface of the maxillo-mandibularis and passes around the an- 
terior border of the ear capsule ventral of the buccalis VII 
(Fig. 3, ac, 6, m). The buccalis VII and ‘‘accessory ramus” 
pass laterad close together to near the lateral border of the 
suspensorium. In this position the two nerves are fused fora 
short distance. Farther cephalad the buccalis holds its usual 
infra-orbital position. The ‘‘accessory ramus’ follows close 
along its lateral aspect to a position ventral of the eye (Fig. 
BG, b, ac). 
Soon after separating from the buccalis VII the ‘‘accessory 
ramus” sends off a large branch which passes laterad and ceph- 
alad to the skin of the cheek caudal of the eye. Ventral of 
the eye it sends another branch to the skin of the cheek, and a 
small twig to the lower eyelid. Ventral of the anterior part of 
the eye there appears, in close relation with the buccalis VII, 
a small nerve which arose from the ‘‘accessory ramus’ a short 
distance ectal of the Gasserian ganglion and, traversing the 
surface of the facial muscles, distributes itself to the skin antero- 
ventral of the eye. 
This general cutaneous branch of the trigeminus, there- 
fore, innervates in the larva of Rana the region corresponding 
to that’in Amblystoma innervated by that nerve from the Gas- 
serian ganglion which is fused with the buccal VII. These 
nerves correspond also in their origin, arising in both cases 
from the dorso-mesal portion of the Gasserian ganglion and 
passing across the dorsal surface of the mandibularis in the one 
case and the maxillo-mandibularis in the other. They corres- 
pond also in the relation to the buccal VII, the extent of the 
fusion being exceedingly reduced in Rana. They correspond 
also in other details which need not be discussed here. We 
must conclude, therefore, that the ‘‘accessory ramus’ of the 
trigeminus in the tadpole is homologous with the general cuta- 
neous portion of the so-called maxillaris in Amblystoma. This 
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