No. 3.] MUSCLES AND NERVES IN AMIA CALVA. 611 
face of that muscle, between it and the adductor mandibulae. 
On the left side of the head it here separated into two parts, 
one of which sent branches into the levator arcus palatini and 
finally entered that muscle, while the other continued back- 
ward along the outer surface of the dilatator operculi. Whether 
this second branch sent branches into either of the two muscles 
or not was not determined. On the right side of the head the 
outer portion of the nerve was found as a single branch extend- 
ing across the outer surface of the levator arcus palatini and 
backward onto the outer surface of the dilatator operculi. 
Not far from the origin of this first branch of the maxillaris 
inferior, but from the under surface of the main nerve, a second 
branch, 7./ms, is given off. In young specimens it arises at 
almost the same level as the first branch, close to the root of 
the truncus trigeminus if not from the ganglion itself, for gang- 
lionic cells are found beyond both nerves, extending even as 
far as the point where the truncus separates into its superior 
and inferior portions. This second branch is often double 
through a large part of its course, the two portions being 
closely applied to each other. It runs at first downward and 
forward immediately internal to and in front of the first and 
second divisions of the levator maxillae superioris, and then 
forward under the eye, lying at first a little below and lateral 
to the united buccalis facialis and maxillaris trigemini, and then 
immediately beneath them. At the front end of the orbit it 
runs diagonally across the upper surface of the third division 
of the levator maxillae superioris, sending branches into that 
muscle, and then forward between the third and fourth divi- 
sions of the muscle, sending one branch to the outer surface of 
the latter muscle, and itself entering it on its inner surface. 
As the nerve ran downward and outward internal to the first 
and second divisions of the levator maxillae superioris it sent, 
in different dissections that were made, one, two, or three 
branches into those muscles; and a little further forward, in 
one specimen, a branch, unfortunately cut in dissection, was 
found entering the tissue near the corner of the mouth, and 
in another a loop was found in the main nerve, as if its two 
portions had become partially separated. 
