424 Mr. Bell's experiments on the structure , &c. 
d. A union of the anterior branches of this nerve, from 
which pass off several nerves to the muscles of the mouth; 
and a branch somewhat more remarkable which advances to 
the muscles of the ala nasi. 
c.f.g. A superficial plexus of nerves formed on the side 
of the neck by this respiratory nerve, or portio dura ; and the 
branches of the cervical nerves ; and the phrenic nerve. 
h. Other remarkable connections formed between the 
phrenic nerve, the descendens noni, and the respiratory of the 
face. 
B. The frontal branch of the trigeminus, or fifth nerve. 
C. The infra-orbital division of the same fifth nerve. This 
branch is large and its subdivisions form a plexus before 
finally dividing to supply the muscles of the nostril and lip. 
D. The third grand division of the fifth nerve, or mandibulo- 
labralis , to the muscles and integuments of the chin and lower 
lip. 
E. The ninth nerve or lingualis • Its descending branch 
will be distinguished, connected with the respiratory of the 
face, the spinal nerves, and the phrenic. It is also connected 
with the superior respiratory nerve ; but that nerve is not 
represented here. 
F. The phrenic nerve, or internal respiratory nerve, 
G. G. G. Cervical nerves. 
