606 ALLELES: [VoL. XII. 
Fig. 39 the ophthalmicus facialis and the buccalis facialis are 
turned back for better illustration. The mandibularis facialis 
is not shown. 
Nerve ‘a’ (v.a) arose under the bundle of fibres that go from 
the posterior root of the trigeminus to the r. ophthalmicus trige- 
mini. It lay at first under the ophthalmic nerve, closely applied 
to it, issued with it through its foramen, and had as it issued 
every appearance of being a branch of it. One of its branches, 
running upward between the ophthalmicus and buccalis facialis, 
pierced the cartilaginous roof of the orbit and, reaching the top 
of the chondrocranium, was distributed with those branches of 
the ophthalmicus trigemini that are associated with the first, 
or first two branches of the ophthalmicus facialis, as already 
described. Other shorter branches entered the tissues above 
and behind the eye. One long branch joined a branch of nerve 
‘c,’ and ran outward with it (ac), in front of, dorsal to, and ex- 
ternal to the buccalis, around the front edge and then backward 
along the outer surface of the adductor mandibulae, lying near 
the upper edge of that muscle. It lay dorsal to and external 
to nerve 13 buccalis facialis, between it and nerve 14. Nerve 
‘b’ (7.6) arose near nerve ‘a,’ ran forward below it, formed no 
anastomoses with the other nerves, and was distributed entirely 
to tissues above the eye. Nerve ‘c’ (7c) arose immediately 
lateral to nerve ‘b.’ It separated into two parts, one of which 
ran outward in front of the buccalis below or internal to nerve 12 
buccalis facialis, between it and nerve 11, and then, after being 
joined by a branch from nerve ‘e,’ ran (7ce) outward and back- 
ward along the outer surface of the adductor mandibulae. It 
lay in this part of its course immediately dorsal to nerve ‘ac.’ 
The remainder of nerve ‘c’ separated into two parts, one of 
which joined the long branch of nerve ‘a,’ as already described, 
while the other ran downward and joining a branch of nerve 
‘d’ was distributed to tissues behind and below the eye (cd). 
Nerve ‘e’ (”¢) arose immediately lateral to nerve ‘c.’ It sep- 
arated into two parts one of which issued behind, that is, inter- 
nal to the buccalis, while the other ran outward and downward 
in front of and external to that nerve. The ramus buccalis 
thus lay between the two main branches of nerve ‘e,’ and as 
