— 741 — 
gives off one, sometimes two, nervi ciliares longi (n. cil. long.), which 
run to the eyeball with the nervi ciliares breves from the ciliary 
ganglion. 
The further course of those fibers of the communicating ramus 
which reach the neighbourhood of the nervus ciliaris crassus can be followed 
only in sections. The microscope shows that about three-fourths of them 
pass forward to the eyeball; but it also reveals the interesting fact that 
the remaining fibers turn caudal, and, running parallel with the short 
ciliary nerves, enter the distal or cephalic end of the ciliary ganglion 
(rad. long., Fig. 2 and 15). The recurrent bundle constitutes, therefore, 
rad. long. 
me: n. cil. brey. 
reg. trig. _ 
es y ij LL; j 7 = 
“IA “ApJ (i ' 
s } 4 We: Y n. cil. cras. 
ee, ey) 
ave, y 
Lp ae ee LES OCINOT. 
n. oc’mot. vent. 
Longitudinal section through the ciliary ganglion of the hen. N. cil. brev., 
small short ciliary nerve composed of fine fibers from the trigeminal region: n. cil. 
cras., large short ciliary nerve (nervus ciliaris crassus) from the oculomotor region: 
n., oc’ mot. vent., ventral continuation of oculomotor nerve; rad. long., long root 
of ciliary ganglion from communicating ramus of ophthalmic division of trigeminus: 
reg oc’mot., oculomotor region of ganglion: reg. trig., trigeminal region of ganglion, 
a radix longa ganglii ciliaris. It is made up of very fine, slightly 
medullated fibers, and is often closely associated with one of the smaller 
ciliary nerves, the two bundles sometimes being bound together in the 
same perineural sheath. The other fibers of the communicating ramus 
— those which pass as long ciliary nerves to the eyeball — are also 
