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122 E®K P L A N A T I O N OF THE TABLES.
C A cut made through the under part of the middle lobe of the brain into
the bottom of the left lateral ventricle.
D The cineritious pulpy part of the right olfaftory nerve dilTeéted away
from the cribriform plate.
E E The medullary fubftance of the left olfadory nerve, part of which is
feeu coming out of the cut corpus ftriatum.
F The vcntricle of the left olfaftory nerve cut open.
The optic nerves incorporated.
H The infundibulum cut.
II The crura cerebri.
KK The tuber annulare.
L L The medulla oblongata.
M The niedulla fpinalis.
N The cut end of the fpinal marrow with the cineritious part in its centre.
FIG. III. Gives a view of part of the bafis of the cranium of a fheep.
AA Proceiies of the dura mater which furround the olfaftory nerve.
BB Inequalities and holes of the cribriform plates for the paflage of the
olfaftpiy nerves.
C The conjoined optic nerves.
D The gianduia pituitaria.
E E The lodgement of the middle lobes of the brain.
FIG. IV. and V. Show that the fpinal marrow is compofed of two large
cords joined together by ailiy coloured fubllance.
AA The. dura mater covering the fpinal marrow.
BBBB The two principal cords which form the right and left fides of the
fpinal marrow.
CC A layer of cineritious fubilance which joins together the two cords BB.
F I G .
E X P L A N A T I O N OF T H E TABLES. 123
FIG, VI. and VII. Shew ,a longitudinal feftion from right to left of the
fpinal marrow.
BBBB The two principal cords which compofe the fpinal marrow.
CCCC The cineritious fubftance joining thefe cords together.
FIG. VIII. Reprefents a tranfverfe fedion of the fpinal marrow of á
íheep.
BB The two principal medullary cords.
C Cruciform cineritious fubilance in the centre of the fpinal marrow, by
means of which the two principal lateral cords are joined together.
FIG. IX. Reprefents the infundibulum of an ox, laid open by a perpendicular
feftion of its fore part.
A Reprefents a tranfverfe feñion of the optic nerves conjoined.
BB The back part of the conjoined optic nerves, and the fore part of the
infundibulum, divided by a perpendicular fedion.
CC The cavity of the infundibulum. The under part of the funnel is compofed
of a more vafcular and darker coloured fubftance than the \ipper
part of it.
D; A fiflùre between the thalami nervorum opticorum, at the upper and
back part of the infundibulum. ^
E An eminence or pifiform procefs at the upper part of the gianduia pituitaria,
in which the infundibulum terminates.
F F I he internal carotid arteries.
GG The third pair of nerves.
H H Parts of the bafe of the cranium to which the fore part of the tentorium
cerebello fuperextenfum is conneded.
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