612 ELIS. [Vou. XII. 
The third branch, 7.@m, of the maxillaris inferior arises some 
distance beyond the points of origin of the first two branches. 
It is given off from the inner surface of the main nerve as it 
turns outward, downward, and backward around the front edges 
of the levator arcus palatini and adductor mandibulae, and is 
destined to supply the two divisions of the latter muscle. It 
separates at once into two main portions, both of which run 
downward and backward, one entering at once the deeper por- 
tion of Az, and the other lying along the outer surface of A3, 
and sending branches backward and downward into it. 
The next or fourth branch of the maxillaris inferior is given 
off from the posterior margin of the ribbon-like nerve just 
before it passes under the upper edge of Az’. It runs backward 
and downward and then downward along the outer surface of 
A.', and is, apparently, destined entirely to the supply of cuta- 
neous and subcutaneous tissues. It separates into three or 
more portions, all of which continue downward along the outer 
surface of A2’, to the extreme lower edge, or corner, of that 
muscle. Here one of the three main branches of the nerve 
turns forward and sends branches upward and downward along 
the outer surface of the hind edge of the mandible; the second 
and largest branch turns inward and forward around the lower 
edges of Az and A3, and then runs forward along the inner 
surface of Ao, lying a little above the upper edge of Meckel’s 
cartilage; the third or posterior branch turns inward and back- 
ward between the lower end of the preoperculum and the sym- 
plectic, and then runs backward and upward along the inner 
surface of the preoperculum, following approximately the line of 
the hind edge of that bone. In larvae branches of this third 
branch were traced directly to the terminal buds on the inner 
surface of the mouth cavity near the upper end of the hyoid. 
Near the point of origin of this fourth branch of the maxil- 
laris inferior a small branch is always found arising from the 
outer surface of the nerve and running forward along the ten- 
don that extends from the origin of Az! to the inner surface of 
the maxilla. It is usually imbedded between Az! and Az”, and 
is not seen without separating slightly those muscles. 
The fifth branch, ~g/s, of the maxillaris inferior is always 
