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 



tr.o. 



/.a. 



11 h.l. p.r. vi vii ix xii 



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



b.o, olfa'ctory bulb : <!>' superior vermis, and cb" % lateral lobe- of cerebellum ; cr, 

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

 h.b. cerebellum ; h.l, hippocampal lobe ; kp, hypophj-sis ; m.b, optic lobes; 

 ni.d, medulla oblongata ; p.v, pons Varolii ; r.f, rhinal fissure ; tr.o, olfactory 

 trar-t ; 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 



