372 NERVOUS SYSTEM. 
ument in the region between the eye and the external ear 
(Fig. 155, #). It anastomoses with the zygomatic branch of 
the seventh nerve (Fig. 155, 4). 
6. N. zygomaticus (subcutaneus male) (Fig. 154, z).— 
This arises with the preceding and follows it for some distance. 
It passes through a foramen in the frontal process of the malar 
bone and is distributed to the lower eyelid and adjacent 
integument. 
c. Nn. infraorbitales (Fig. 154, 7; Fig. 155, /7).—The 
infraorbital nerves are two of nearly equal size. They pass 
through the orbit ventrad of the eyeball to the infraorbital 
canal. On their course each divides once or twice and each 
divides again in the infraorbital foramen, so that about eight 
branches emerge from the infraorbital foramen and diverge to 
the integument and whiskers of the upper lip and to the side 
and wing of the nose (Fig. 155, 7). In the infraorbital canal, 
and before reaching it, branches are given to the molar teeth, 
and a branch continues in the bone to the canine, incisor, and 
premolar teeth. 
d. N. sphenopalatinus (Fig. 154, g).—The sphenopala- 
tine nerve turns mediad from the infraorbitals, directing its 
course toward the sphenopalatine foramen. Before reaching 
this it gives off the greater palatine nerve (N. palatinus 
major), which enters the posterior palatine canal and passes 
to the hard palate. The sphenopalatine then usually divides 
into two branches which pass along. side by side to enter the 
sphenopalatine ganglion. This is a large elongated triangular 
ganglion lying on the dorsal surface of the external pterygoid 
muscle, just laterad of the sphenopalatine foramen. 
The following nerves are connected with the sphenopala- 
tine ganglion: 
a. N. palatinus minor.—This leaves the craniolateral 
angle of the ganglion and passes to the soft palate. 
b. N. nasalis posterior.—The posterior nasal nerve enters 
the nasal cavity by the sphenopalatine foramen and is dis- 
tributed to the mucosa of the ventral and middle parts of the 
nasal cavity. 
c. N. canalis pterygoidii (Vidian Nerve).—This is a large 
