458 Grace B. Watkinson 
nerve emerges from its ganglion. It passes under the tendonous 
origin of muse. depressor palpebrae inferioris on the chondrocranium, 
into the dorsal optie region, and ends here in a number of fine 
branches which spread to innervate the skin in ‘the region in front 
of the eye. 
a) Ramus ciliaris arises from ventral side of the nerve near the 
origin of A. and passing dorsal to musc. bursalis, enters the side 
of the eiliary ganglion formed by ramus ceiliaris nervi oculomotorii. 
From this point onward, the nerve takes the name of — 
B. Ramus nasalis, from which no further branches are disco- 
verable until the posterior extremity of the septum narium is reached. 
Here we find — 
b) Ramus communicans cum ramo palatino VII. running: across 
the posterior extremity of the internal nares and composed of at 
least two distinet fibre bundles which form a connection with ramus 
palatinus VII. 
c) Ramus lateralis nasi is given off shortly anterior to (b.) and 
is slightly smaller in size than ramus medialis nasi. It passes dor- 
sally over the cartilaginous capsule of the nose immediately beneath 
the outer skin, and ends in several branches which diverge from 
the point of origin as they spread to innervate the region of the _ 
anterior nares and the olfactory capsule itself. 
d) Ramus medialis nasi comprises the remainder of ramus 
nasalis. It enters the nasal cavity and runs close to the septum 
narium in the dorsal part of the nasal region, closely parallel with 
and dorsal to nervus olfactorius, to the region of the premaxil- 
lary bone, where it divides into the two terminal branches, as 
follows: 
e) Ramus premaxillaris superior, the more dorsal, and 
f) Ramus premaxillaris inferior, the more ventral branch. 
These spread in a number of fine fibres to innervate the skin 
at the tip of the nose. 
2. Ramus maxillaris, the second main branch of nervus 
trigeminus, arises from the portio major of the Gasserian ganglion 
(semi-lunare, FISCHER) and runs directly anterior between mm. ptery- 
goideus on the median surface, and capiti-mandibularis on the lateral 
surface, to the orbit where it meets the arteria temporo-musecularis 
(Bosanxus) and bending with it ventrally, makes the circuit of the 
external surface of the bulbus, medial to musec. depressor palpebrae 
inferioris, as »nervus infraorbitalis«, and enters, as nervus »alveolaris 
