66 



LECTURES ON THE CENTRAL NERVOUS SYSTEM. 



cornu ammonis and the intercalation of the atrophic cortical 

 bundle of the gyms dcntatns. 



The pyramidal cells of the cornu ammonis are not directly 

 continuous with those of the gyms dentatus, as might be 



FlG. 38. 



Section through the base of the brain and the subjacent gyms hippocampi. The 

 choroid plexus is drawn somewhat simpler than it really is in the adult. Notice how it 

 separates the ventricle from the cavity of the skull. 



Oberfllichlichea Mark, Superficial medullary matter. 



expected from the diagram, Fig. 3-i. They end rather by being 

 massed irregularly together (at a in Fig. 38), and this irreg- 

 ular mass is surrounded by the regularly placed cells in the 

 curve of the gyrus dentatus. These and the other layers which 



