GENERAL MORPHOLOGY OF THE NERVOUS SYSTEM 



FIG. 1 1 . The mesial surface of the right half of the brain of a selachian, Sqitalits 

 acanthias, to show the secondary segments of the brain, the longitudinal zones of 

 the medulla oblongata, the form of the ventricle and the position of the inferior 

 lobes, dorsal sac, paraphysis, etc. The olfactory bulb is not drawn (compare Fig. 147). 



