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pass together through a special foramen in the ventral 
edge of the alisphenoid into the eye muscle canal. The 
cord from the second ganglion also enters the canal by 
the same foramen. Before reaching the ciliary ganglion 
the profundus nerve separates from the sympathetic as the 
Ramus ciliaris longus (see profundus nerve), but some 
fibres are dispatched from it to accompany the sympathetic 
to the ganglion as the Radix longa. The ciliary ganglion 
itself (cz/. g.) is closely attached above to the main trunk 
of the oculomotorius, after the latter has given off the 
nerve to the rectus superior. The Radix brevis therefore 
is exceedingly short (rv. b.). From the ciliary ganglon 
in front arises the R. ciliaris brevis (cl. 6.). This passes 
forwards in the eye muscle canal, accompanying the main 
trunk of the oculomotorius, until the latter breaks up. It 
then courses under the lower or right optic nerve as a 
conspicuous bundle, enters the eye ball with it, and there- 
after passes downwards and forwards towards the iris. 
As regards now the eyeless or left side, the sym- 
pathetic nervous system, lke the nervous system 
generally, is not so well developed. This is especially 
noticeable in the ganglia, which are perceptibly smaller 
than those of the other side. In front, the disturbance 
of the symmetry has dragged the sympathetic over to the 
oenlar side. Generally speaking, however, the left side 
resembles the right in all essential respects, but the fol- 
lowing differences may be mentioned. 
In the spinal sympathetic the seventh ganglion (7’) 
is in two parts, R. communicans vi. (com. vw.) is separated 
from its ganglion (6/), and R. communicans v. (com. v.) is 
situated between a large and a small ganglion (5/ and 5”). 
Ganglion 2. gives off externally a large nerve which passes 
backwards and downwards to the kidney. R. communi- 
cans il. (com. 2.) is single, but the first (com. 7.) is however 
