24 PISCES. 



PLATE VIII. 



THE COD. 



(GADUS MORRHUA.) 



FIG. I. 



THE DOESAL ASPECT OF THE BEAIN AND SPINAL 



COED. 



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, 



