180 JULIA WORTHINGTON. 
N. Acus. b. Acustico-lateral nerves. NN. Gl-ph. & Vag. Glosso-pharyn- 
geus and Vagus. W. O/f. Olfactory nerve. WN. Opt. Optic nerve. O. ch. 
Optic chiasma. o/f g. Olfactory glomeruli. o/f. 7. Olfactory lobe. of o. 
Olfactory organ. R. Nas. Ramus nasalis. R. Mand. ant. 2, R. Mand. ant. 3, 
R. Mand, ant. 4. Second, third, and fourth branches of ramus mandibu- 
laris anterior. RR. Mand. dent. Ramus mandibularis dentalis. R. 
Mand. post. 1, R. Mand. post. 2.. First and second branches of ramus 
mandibularis posterior. KR. Mand. post. 2a. Anterior branch of ramus 
mandibularis posterior 2. R. Mand. post. 24. Posterior branch of 
ramus mandibularis posterior 2, running to the “club muscle.” R. 
Maz. ant. Ramus maxillaris anterior. R. Oph. cut. V. Ramus oph- 
thalmicus cutaneus Trigemini. RR. Oph. sup. V. Ramus ophthal- 
micus superficialis Trigemini. R. Oph. pro. V. Ramus ophthal- 
micus profundus Trigemini. FR. Pal. Ramus palatinus. R. pro. 
v. g) Ramus profundus maxillaris velo-quadratus. Sp. c. Spinal 
cord. Sp. 1. First spinal nerve. Sp.o. 1. First spino-occipital nerve. Sp. 
o. 2. Second spino-occipital nerve. s. V. Sensory Trigeminus. 7¢. &. 
*Tween brain. Zen. 1, Ten. 2, Ten.3, Ten. 4. First, second, third, and fourth 
tentacles. ¢r.c.s. Tractus cerebello-spinalis. ¢.f. ¢. Tract running 
from the fore brain to the ’tween brain. ¢.4.¢. Tractus habenulo- 
tectalis. ¢r.o.c. Tractus olfacto-cerebellaris. ¢.¢.d.e¢s. Tractus 
tecto-bulbaris et spinalis. v.p. Vascular plexus. v. 4. Ventral horn 
of the spinal cord. III v, [V v. Third and fourth ventricles. I, II, V, VII, 
Villa, VIIL4, Ville, VIII d, 1X, X. The cranial nerves respectively. 
PLATE 8. 
Fic. 1.—The brain, dorsal view. x 834. 
Fic. 2.—The brain, ventral view. x 7. 
Fic. 3.—The brain, lateral view. x 7. 
Fie. 4.—The medulla. The fore part of the brain is bent down till it forms 
with the medulla an angle of 120°. x 7. 
Fic. 5.—Diagram of the ventricles of the brain. The dotted parts are 
always open. xX 7. 
Fie. 5 a.— The semicircular canal at the base of the infundibulum. x 7. 
PLATE 9. 
Fic. 6.—Photograph of a sagittal section of the brain, a little removed 
from the median plane. x 15. 
