Pallium 



Diencephalon Mesencephalon 



Cephalic 

 ' xure 



B 



Thalamus 



Pallium 



Mesencephalon 



Optic 

 cup 

 P online flexur 



Myelencephahn 



Meten- 

 cephalon 

 Corpus striatum 

 Optic recess 



Hypothalamus 



Medulla oblongata 



Fig. 15. Developing brain from a 7 mm. human embryo showing the vesicles. 

 A, lateral view; B, median sagittal section. The fore-brain consists of the telen- 

 cephalon (region labelled pallium) and diencephalon ; the mid-brain consists of the 

 mesencephalon, and the hind-brain of the metencephalon (cerebellum) and 

 myelencephalon (medulla oblongata). The portion of the fore-brain which 

 becomes the retina of the eye is indicated in A as the optic cup. From Prentiss and 

 Arey, Embryology. By permission of W. B. Saunders and Co. 



