Page:Illustrations of the comparative anatomy of the nervous system.djvu/65

 PLATE VIII.

THE COD.

(GADUS MORRHUA.)

FIGURE I.

THE DORSAL ASPECT OF THE BRAIN AND SPINAL CHORD


 * a. ANTERIOR lobes of the brain.
 * b. Optic or posterior lobes of the brain.
 * c. Cerebellum.
 * 1. Olfactory nerve, arising from the anterior lobe of the brain, and passing forward and forming a round ganglion near the nose, from which branches are sent to the membranous plaits or folds exposed on the left side.
 * 2. Optic nerve.
 * 3. Third nerve, giving branches to all the muscles of the eye, except the superior oblique and abductor, and sending ciliary branches to the interior of this organ.
 * 4. Fourth or pathetic nerve, arising just behind the posterior point of the optic lobe.
 * 5. Fifth nerve, arising from the restiform body, and dividing into several large branches, to be distributed on the muscles and skin of the head and face; many of those given to the skin pass in filaments through openings in the bone.