742 ALETS. [Vor. XII. 
10. The profundus ganglion is found both in larvae and in 
the adult as a separate and distinct ganglion, connected with 
the ciliary ganglion by a radix longa, and with the brain by a 
profundus root, which, in larvae, is wholly separate and distinct 
from the root of the trigeminus, but, in the adult, is somewhat 
fused with that root. 
From the ganglion arise, in addition to the radix longa, two 
ciliares longi, a large and important portio ophthalmici pro- 
fundi, and often, but not always, a small, delicate, and appar- 
ently degenerating nerve. 
11. The portio ophthalmici profundi may be single, double, 
or even triple. It runs forward and upward, dorsal to all the 
muscles of the eyeball and the nerves innervating them, and 
joins and completely fuses with the ramus ophthalmicus super- 
ficialis trigemini, while that nerve is still in the orbit. Its 
position thus shows that it cannot be the homologue of the 
ramus ophthalmicus profundus trigemini of selachians and 
other animals, that nerve always lying below the superior 
branch of the oculomotorius, and below the nervus trochlearis. 
It must, therefore, correspond to certain of those frontal 
branches of the ophthalmicus profundus of selachians that arise 
from that nerve before it passes under the rectus superior. 
There is, therefore, no true ramus ophthalmicus profundus in 
Amia, that nerve being apparently represented by the small and 
delicate nerve often found arising from the profundus ganglion. 
12. The ciliary ganglion is a separate and well-developed 
ganglion, connected with the profundus ganglion by a long 
radix longa, and with the nervus oculomotorius by short fibres, 
which represent the radix brevis. From the ganglion a single 
nerve arises, the ciliaris brevis. 
13. The trigemino-facial ganglionic complex lies in the 
upper, lateral chamber of the eye-muscle canal, and consists 
of three parts between which no communicating fibres could be 
traced. The three parts are the profundus ganglion, which is 
entirely separate and distinct, the main trigemino-facial ganglion, 
and the ganglion of the buccalis and ophthalmicus facialis. 
The latter ganglion lies on, and partly imbedded in, the upper 
surface of the anterior part of the main ganglion. 

