XIII 



PHYLT'M CHOltDATA 



57'; 



interior of the liemisphcres arc of laroo size and somewliat complex 

 form. 



The optic lohoi, which are relati\^ely small, are divide,! into four 

 parts, and are hence called the corpora qvadrigemina. Tlie 



Cr.c 



nil 'J^"^'' 



mi 





Hvji W Fo TIVM 



Fir;. Ii02. - Brain of Dog. A, dorsal ; B, vcritial ; i\ lateral asjiert. B. ol. olf.u'tory bulb ; CV. rv. 

 crura cerebri ; Fl. p. great lougiturlinal fis.surc ; HH, RW , lateral lobes of eerebelliirn ; Ihip, 

 hypophysis ; Me.iL spinal cord ; A'//, medulla oblongata ; To. pons Varolii ; VH. cerebral 

 hemispheres ; Wv, nriddle lobe (vermis) of cerebellum ; I—XIL cerebral nerves. (From 

 Wiedersheirn's Coniiaimlin Anntoinv.) 



phual hocly is always a small, gland-like structure. Connecting 

 together the lateral imrts of the cerebellum, which, in the higher 

 Mammals, attains a high degree of development, is a transverse 



O O •11' 



flattened band — the pons Varolii (Fo.) — crossing the hind-brain 

 on its ventral aspect. 



