THE NERVOUS SYSTEM. 



483 



Fig. 414. — Lateral view of the outside of a model of the brain of a human 

 embiyo two weeks old. His. 



Diencephalon 



Pallium 



Mesencephalon 



Rhombo- 

 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. 



