THE NERVOUS SYSTEM. 



483 



FIG. 414. Lateral view of the outside of a model of the brain of a human 

 embryo two weeks old. His. 



Diencephalon Pallium 



Mesencephalon 



Rhombq- 

 mesencephalic fold 



Rhombencephalon 



Neuropore 

 Corpus striatum 

 P. f. 

 Optic evagination 



Ventral cephalic fold 

 (Seesel's pocket) 



Pons region 



FIG. 415. Lateral view of inner side of the same model shown in Fig. 414. His. 

 P.f. is the ridge corresponding to the peduncular furrow on the outer side. 



