230 MR. R. OWEN ON THE ANATOMY 
inferior vermiform process is straight, narrower than the upper one, and very promi- 
nently developed: these, with the lateral convolutions of the cerebellum, are subdivided 
as usual into narrow transverse folds. On divaricating the cerebral hemispheres, the 
corpus callosum was seen to be situated from nine to ten lines below the superior surface 
of the brain. Large and prominent corpora striata, a small triangular septum lucidum, 
with the fornix and other usual structures, were observed in the dissection of the lateral 
ventricles. The pineal gland presented a depressed subrhomboidal figure, and a very 
firm solid texture; but no particles of earthy matter could be discerned in its substance 
with the naked eye. The bigeminal bodies have the usual proportions observable in 
other Ruminants ; the superior pair being the largest masses; the inferior bodies, or 
testes, resemble a thick transversely arched commissure, with the concavity applied to 
the superior vermiform process of the cerebellum, and the two extremities enlarged and 
rounded. 
The following admeasurements of the brain and its parts were taken. 
Inches. Lines. 
Longitudinal diameter of the bran . . . . . . 5 2 
Vertical ditto 
Breadth of the cerebrum 
Length of the cerebellum 
Breadth of ditto 
Length of the pons Varolii . 
Breadth of ditto : 
Length of the corpus callosum . 
Length of the pineal gland . 
Breadth of ditto Piece (ees 
Breadth of the superior bigeminal bodies 
Depth of dittosthy Mesa. ants Re te 
Breadth of the inferior bigeminal bodies 
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Weight of the entire brain, stript of its membranes, fourteen ounces avordupoise. 
The olfactory nerves were very large, as in most Ruminantia, and terminated in ex- 
panded bulbs, in length one inch and a half, in breadth one inch; these were lodged in 
special compartments of the cranial cavity. The optic nerves and ninth pair were re- 
latively larger than in the Deer or Ox, corresponding with the magnitude of the eye, 
and the length and mobility of the tongue in the Giraffe. The other cerebral nerves 
presented no peculiarity. 
The spinal chord is closely invested by the dura mater, which is thinner on the dorsal 
than the ventral region of the chord. ‘The posterior roots of the nerves perforate the 
dura mater and converge to form the ganglia on the outside of that membrane. The 
chord is chiefly remarkable for the extreme length of the cervical portion. In the 
male Giraffe dissected at the Zoological Gardens, and which measured eight feet from 
