CH. XLIII.] 



PRIMARY DIVISIONS OF BRAIN 



625 



Figs. 455 and 456 represent a diagrammatic view of a vertebrate 

 brain; the attachment of the pineal gland, pituitary body, and 

 olfactory (I) and optic (II) nerves is also shown. 



Hmp 



ix v 



17 



Fm. 456. Longitiidinal and vertical diagrammatic section of a vertebrate brain. Letters as before 

 PV, pons Varolii. Lamina terminalis is represented by the strong black line joining Pn and Py. 

 (Huxley.) 



2 R 



