OF THE ORNITHOEYNCHUS PARADOXUS. 171 
or accurate, since I had no opportunity of viewing the brain 
and spinal marrow, those great central organs of sensation, 
with which all the nerves of the body, directly or indirect- 
ly, communicate ; and I could not trace any nerve very 
completely to its termination, for fear of destroying other 
important parts. 
The first, second, third, fourth, and sixth pairs of cere- 
bral nerves, I either did not see at all, or only in a partial 
way. I have not the least doubt of their being quite regu- 
lar in their distribution. The fifth has been already de- 
scribed, whilst speaking of the organs of touch and taste. 
The auditory nerve was not seen ; the facial, which I pre- 
fer calling by the name of the portio dura of the seventh 
pair, to any other yet invented, was regular as to its pre- 
sence and size. Its distribution was chiefly to the cheek- 
pouches, and back and side of the head, around the exter- 
nal orifice of the ears ; but it did not approach the nostrils, 
for a very obvious anatomical reason, and, consequently, in 
this animal at least, has nothing to do with the organs of 
respiration. The eighth, or par vagum, the ninth, with 
the nerve called the descendens noni, the spinal accessory, 
and the cervical portion of the sympathetic nerve, were 
very strictly as in the Mammalia. I also remarked, that 
the sympathetic nerve, in its passage down the neck, was 
more distinctly marked and detached from the par vagum, 
than in many animals supposed to stand much higher in 
the scale of the animal creation. The superior cervical 
ganglion was very small, but at this point the sympathetic 
branch united with the par vagum. Immediately above 
this union the nerves were again distinct, and three 
branches belonging to the sympathetic nerve could be 
traced proceeding towards the fifth pair. The inferior cer- 
vical ganglion was large, but there did not exist any middle 
one. The cervical nerves were large and regular. No- 
