404 



EMBRYOLOGY OF THE BRAIN AND SPINAL CORD. 



Mesencephalon 

 (Mid-brain) 



f Pedunculi cerebri. 



Lamina quadrigem 



( Bases pedunculi 

 4 Substantia nigra 

 (. Tegmenta. 



f Corpora quadrigemina- 

 Colliculi superiores 



Colliculi inferiores 

 ma. 



Brachia 



Brachia superiora 

 Brachia inferiora. 



Metencephalon * 



Isthmus rhomben- C Pedunculi cerebri 

 cephali (in which < Brachia conjunctiva 

 are) (. Velum medullare superius. 



Cerebellum, 



Pons Varolii. 



Cortex 



Corpus medullare 



Ganglia 



(Pedunculi cerebelli) 

 Vela medullaria. 



Myelencephalon -I Medulla oblongatz 



In the following resume of the formation of the central nervous 

 system, I have drawn so largely from Prof. McMurrich's "Devel- 

 opment of the Human Body" that I wish at this point, to make 

 grateful acknowledgment of my indebtedness to him. 



TELENCEPHALON. 

 TABLE VI. 



DERIVATIVES OF TELENCEPHALON. 



(Modified from McMurrich's Embryology.) 



In Median Structures. In Hemisphere. 



Floor of chorioidal fissure 

 (. 

 (in part). 



( Roof epithelium of the aula \ 

 Roof-plate (. 



( Lamina terminalis (in part). 



~ 1T . ( Lamina terminalis (in part) 

 DorsalLamma J _ 



Optic vesicle. 



Neopallium 

 Rhinencephalon 

 . Corpus striatum. 



