THE BRAIN. 511 
Ly 
Fie. 364. Fic. 365. Fia. 366. 
Fic. 364.—Brain of Bigeou (after Ferrier). .4, cerebral hemispheres ; B, optic lobe ; C, cere- 
bellum, the lateral lobes of which are very small. 
Fig. 365,—Brain and spinal cord of chick at sixteen days old ; optic lobes, b, are still in con- 
tact (after Owen and Anderson). 
Fia. 366.—Brain and part of spinal cord of chick twenty days old, showing optic lobes widely 
separated and cerebellum, c, largely developed. 
elsewhere, concerned in co-ordination, vision, etc., are well 
developed, the cerebrum, especially its lobes as distinguished 
from its basal ganglia, is, out of all proportion, greater than 
in any other animal. 
Fic. 867.—Outer surface of brain of horse (after Solly and Leuret). e, olfactory lobe: h, hip- 
pocampal lobe (processus pyriformis) ; 1, 2,3, lobes of cerebellum; 0, optic nerve; m, 
motor oculi: p, fourth nerve; ¢, fifth nerve; uw, sixth nerve; f, facial; 1, auditory ; 9, 
. glosso-pharyngeal ; v, vagus; s, spinal accessory ; , hypoglossal : X, pons Varolii. 
Fie. 368.—Longitudinal section through center of brain of horse, presenting view of internal 
surface (after Solly and Leuret). c.c, corpus callosum: p, thalamus; co, middle com- 
missure : ¢t. q, corpora quadrigemina, in front of which is the pineal body. The cerebel- 
lum has been cut through. 
