708 : MAMMALIA. 
and there is a sympathetic system as in most other 
Vertebrates. 
The cerebral hemispheres of the rabbit are very slightly convoluted, 
and they leave the cerebellum quite uncovered. They are connected 
Fic. 387.—Dorsal view of Fic. 388.—Under surface of rab- 
rabbit’s brain. bit’s brain. —After Krause. 
off.t., Olfactory lobes; ¢.%., cere- olf.l., Olfactory lobes ; 0.7., olfactory tract; 
bral hemispheres; 0./., optic J-t., frontal lobe of cerebral hemisphere ; 
lobes (corpora quadrigemina) ; ch, optic chiasma; é.c., infundibulum ; 
cb., median part of cerebellum ; ¢.m., Corpus mammillare; 3, root of 
Fl., flocculus of cerebellum; oculomotor; 4, root of pathetic; 5, 
10, root of the tenth or vagus root of trigeminal ; 6, root of abducens 3 
nerve; s.¢., spinal cord. 7-8, roots of facial and auditory: F/., 
flocculus of cerebellum ; 9, root of glosso- 
pharyngeal ; 10, roots of vagus; H., r2th, 
or hypoglossal ; 4.v., pons Varolii. 
transversely by a broad bridge—the corpus callosum, and beneath this 
there is a longitudinal band of fibres—the fornix. The corpus callosum 
is readily disclosed by gently separating the hemispheres. The outer 
-wall and floor of the anterior part of the cavity or ventricle of each 
