468 



ZOOLOGY 



SKCT. 



Nervous System. The neural cavity, as in the Pigeon, con- 

 tains the central organs of the cerebro-spinal nervous system 

 the brain and spinal cord. The brain (Figs. 1094-1096) of the 

 Rabbit contains the same principal parts as that of the Pigeon, 



m I ly i v 



p.v. vi vii ix xii 



FIG. 1094. Lepus cuniculus. Brain. A, dorsal, B, ventral, C, lateral view. b. o. olfactory 

 bulb ; cb', median lobe of cerebellum (vermis) ; cb". lateral lobe of cerebellum ; cr. crura 

 cerebri ; ep. epiphysis ;/. b. parencephala ;/ p. longitudinal fissure ; h.b. cerebellum ; hp. hypo- 

 physis ; m. b. mid-brain (corpora quadrigemina) ; md. medulla oblongata ; p. v. pons Varolii ; 

 i xii, cerebral nerves. (From Wiedersheim's Comparative Anatomy.) 



with certain differences, of which the following are the most 

 im portant. 



The surface of the cerebral hemispheres or parencephala (Fig. 

 1094, /. &., Fig. 1095, c.h.), which are relatively long and narrow, 

 presents certain depressions or snlci, \vhich, though few and in- 



