124 MR. yguatt’s veterinary lectures. 
the superior eyelid, the integument of the forehead, and the pe¬ 
riosteum. The lachrymal, as its name would import, is chiefly 
given to the lachrymal gland : some few ramifications are pre¬ 
viously sent to the conjunctiva and the ciliary glands of the up¬ 
per lid ; while a distinct twig of it passes out at the angle between 
the zygoma and the frontal orbital process, and anastomoses 
with the supra-orbital, and with ramifications from the superior 
maxillary, and is also lost on the integument and muscles of the 
forehead. 
The Ophthalmic Ganglion .—The third and the largest is the 
lateral nasal . Almost at its commencement we observe the fila¬ 
ments that help to form the ophthalmic ganglion, to which I al¬ 
luded when speaking of the optic nerve. They are more nu¬ 
merous, and more easily traced, in some of our domesticated ani¬ 
mals than in others ; and the ganglion itself is differently develop¬ 
ed, but for what physiological purpose I know not. It is com¬ 
paratively larger in the ox than in the horse, and sends more 
nervous filaments to the iris. Four distinct ones may be traced 
in the ox, but seldom more than two in the horse or the dog. 
To these filaments, others of the ophthalmic that have not passed 
through the ganglion, afterwards join themselves, so that the 
ciliary nerves are also minute compound ones of motion and sen¬ 
sation ; but more of this when we treat of the eye. 
Course of the Ophthalmic .—After running between the rectus 
superior and the retractor, it gives a branch to the membrana 
nictitans, and then takes a singular course. Some ramifications 
go to the frontal sinuses and the foramina, and which, piercing 
the orbit of the eye for this purpose, are beautifully seen in 
young animals, and particularly in the sheep : the main branch 
then enters the cranium again through the internal orbital fora¬ 
men, passes under the dura mater, and, in the manner that I 
have described in the fifth lecture, returns through the cribriform 
plate, and ramifies on the membrane of the nose, and sends some 
branches as low as the false nostril and the alae of the nose. 
The Anterior Maxillary Nerve, or second Division of the Tri¬ 
geminus. —This contains so little that is peculiar to the quadru¬ 
ped, or of practical tendency, that I shall pass it very briefly 
over. The different situation and conformation of the bones of 
the face cause the principal or only variation in the distribution 
of this branch in the biped and the quadruped. It leaves the 
cranium through the foramen rotundum ; and at ihe base of the 
skull gives off small ramifications to the inner canthus of the 
eye, the antrum and the two posterior molars ; also to the cavity 
of the nose through the spheno-palatine foramen, supplying the 
lateral portion of the nasal cavity ; while filaments are given 
