xin 



PTTYLUM CIIORDATA 



;)77 



interior of the licmisphorcs arc of largo h'v/.q nnd somewhat complex 

 form. 



The optic lobc-% which are relatively small, are divided into four 

 parts, and are hence called the rorjiora quadrigemina. The 



Ifl'jj M Fo IT \W 



nt^ ^ 



■^■ 



Fk;. 1'202. — Brain i>f Dog. .4. dorsal ; B, ventral ; C, lateral aspect. B. ol. olfactory bulb ; Cr. re. 

 crura cerebri ; Fi. /). great longitudinal fissm-e ; ////, flH', lateral lobes of cerebellum ; flpp. 

 hypojihysis ; Med. spinal cord ; NH, medulla oblongata ; Po. pons Varolii ; VII. cerebral 

 hemispheres ; W^i, middle lobe (vermis) of cerebellum ; I— XII. cerebral nerves. (From 

 Wiedersheim's ComiiKrutirc Anatomij.) 



pineal hody is always a small, gland-like structure. Connecting 

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

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

 flattened band — the pons Varolii {Po.) — crossing the hind-brain 

 on its ventral aspect. 



