BRAIN 



223 



connections of the pallial cortex in various directions, and in- many 

 Birds indications of cortical centres can already be recognised. 



In the well-developed hemispheres frontal, parietal, and temporal 

 regions can be recognised : their surface is perfectly smooth, and 



f-P- 



\ 



I lu 



h.l. 



FIG. 170. BRAIN OF RABBIT. A, dorsal ; B, ventral ; and C, lateral view. 



6.0, olfactory bulb ; rb' superior verniis, and <!>", lateral lobe of cerebellum ; r/-, 

 crura cerebri ; fp, pineal body ; f.b, cerebral hemispheres ; f.p, pallial fissure ; 

 h. b, cerebellum ; h.l, hippocampal lobe ; lip, hypophysis; m.b, optic lobes; 

 iii.tl, medulla oblongata ; ji.r, pons Varolii ; r.f, rhinal fissure ; tr.o, olfactory 

 tract; i-xii, cerebral nerves. 



the lateral ventricles are not extensive. The different parts of the 

 brain overlie one another much more markedly than in any Reptile, 

 and the hemispheres are much larger relatively, covering over the 

 diencephalon and part of the mid-brain. The olfactory lobes are 



