THE STRUCTURE OF THE BRAIN STEM 



363 



C-8 



AMMOOCETES 



PN 



TELEOSTEA 



AMPHIBIA 



CB 



REPTILIA 



MAMMALIA 



,Fic. 180. Diagrammatic view of the brain in different classes of vertebrates. 



(GASKELL.) 



CB, cerebellum ; PT, pituitary body ; PN, pineal body ; C.STR, corpus striatum ; 

 GHR, right ganglion habenulae ; I, olfactory ; n, optic nerves. 



