468 



ZOOLOGY 



SECT. 



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

 tains the central organs of the cerebro-spinal nervous system — 

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

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



ep.. 



Fin. 1094.— lepus cunicnlus. Brain. A, dorsal, B, Tentral, C, lateral view. li. o. olfactory 

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

 cerebri ; ep. epipbysis ;/. b. parencepliala ;/. p. longitudinal fissure ; h.b. cerebellum ; 7i^. hypo- 

 physis ; in. b. mid-brain (corpora quadrigemina) ; ?)id. medulla oblongata ; p. v. pons Varolii ; 

 i — xiij cerebral nerves. (From Wiedersheim's Comparative Anatomy.) 



with certain differences, of which the following are the most 

 important. 



The surface of the cerebral hemispheres or parencephala (Fig. 

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

 presents certain depressions or sulci, which, though few and in- 



