mt. 
No. 3.] MUSCLES AND NERVES IN AMIA CALVA. 603 
given off by the ophthalmicus trigemini on both sides of the 
head, and the nerve then breaks up into several terminal 
branches all of which lie under the nasal bone, in the mem- 
brane covering the nasal sack, and run forward on both sides 
of the facialis toward the end of the snout. 
The portio ophthalmici profundi (off) joins the ophthalmi- 
cus superficialis trigemini a little proximal to the branches of 
that nerve that accompany the branch of the facialis to organ 
6 supraorbital. On the right side of the head, in the one 
specimen, the superficialis had separated, opposite the point 
of union with the portio profundi, into two nearly equal 
strands. No other instance of such a separation was found. 
c. Ramus Buccalis Facialis. 
The buccalis facialis (f) arises from the outer side of the 
ganglion common to it and the ophthalmicus facialis. It issues 
from the upper, lateral chamber of the eye-muscle canal, through 
the large trigeminal foramen, with the superior and inferior 
maxillary nerves, lying immediately above them. It then 
turns downward and runs downward, outward, and forward 
behind and under the eye, and then forward and inward toward 
the end of the snout, lying immediately external to and above 
the maxillaris superior. It is distributed entirely to the organs 
of the infraorbital sensory canal (No. 3, p. 514). On the left 
side of the head there were, in the specimen used for illus- 
tration, fifteen of these organs, on the right side the normal 
number, fourteen. 
The oticus facialis (ef), which is simply a branch of the 
buccalis, arose on both sides close to the base of that nerve. 
It ran upward and outward through the cranial cartilage and, 
as in the embryo, supplied organs 15 and 16 infraorbital and 
the organ of the spiracular canal. Close to its base the branch 
to organ 14 infraorbital arose, a little further forward the 
branch to organ 13, and close to this last branch, on the left 
side of the head, two branches, and on the right, a single one, 
double at the end. There were beyond this group of nerves 
eleven buccal branches on each side of the head, the first 
