orpuscle.

Figure 5. To illustrate Kidney structure.--
a.b.v., and e.b.v., afferent and efferent blood-vessels, of which the
latter go to break up upon the tubli.
B.c., one of Bowman's capsules of the cortex;
ur.t., the uriniferous tubule running from it into the medulla, where
it loops and branches; around it branches a blood-vessel, of which the
latter go to break up upon the tubuli.
c., cortex.
g., glomerulus, a knot of blood-vessels in the capsule.
m., medulla.
p., pelvis.
ur., ureter.

The water of the urine is probably filtered off in the capsule, the urea
and other salts secreted by the tubuli.

{No Figure 6.}

Figure 7. The Auditory structures of the Rabbit (diagram). See text,
Section 115.

Figure 8. The Eye (diagram). See text, Section 111.

Figure 9. The Retina (diagram). See text, Section 112.

{Illustration: Diagram Sheet 7.}

Sheet 8

The Brain of the Rabbit.--

1. In median section. 2. From above, with the top of the right
hemisphere sliced off horizontally at the level of the corpus callosum.
3. A deeper section through the thalamencephalon, corresponding to
B in (1). 4. Under-view of the brain. 5. Diagram referred to in the text
and for comparison with Sheet 7, 3b., and Sheet 18, 2.

{Figures 1-5.}
ar., arrow in the iter.
a.c., the anterior commissure, a thickening of the anterior wall of the
third ventricle.
c.c., corpus callosum.
c. cb., crura cerebri.
c.h., cerebral hemispheres.
c.q., corpora quadrigemina.
f.cbm. (right), flocculus of the cerebellum.
l.h., left cerebral hemisphere (=ch.).
l.l., lateral lobe of cerebellum.
m.c., middle commissure.
m.o., medulla oblongata.
op., optic nerve.
o.l., olfactory lobe.
o.th., (right), optic thalamus.
p.c., posterior commissure (thickening of postero-dorsal wall of the
third ventricle).
p.g., pineal gland.
pt., pituitary body.
p.V., pons Varolii.
s.c., thin roof of the fourth ventricle.
v.cbm., vermis of cerebrum.
v.l., lateral ventricle.

{Figure 4.} Nerves.--
I., Olfactory.
II., Optic.
III., Oculo-motor.
IV., Patheticus.
V., Trigeminal.
VI., Abducens.
VII., Facial (portio dura).
VIII., Auditory (portio mollis).
IX., Gustatory (glossopharyngeal.
X., Pneumogastric or vagus.
XI., Spinal Accessory.
XII., Hygoglossal.

Figure 6. The Spinal Cord in section.--
c.c., the central canal.
d.f., the dorsal fissure.
d.n., the dorsal nerve root; g., its ganglion.
v.f., the ventral fissure.
v.n., the ventral nerve root.