THE RABBIT. 



371 



olf- 



o7f 



FIG. 71. Lepus cuniculus. Two dissections of the brain, from 

 above (nat. size). 



In A the left cerebral hemisphere is dissected down to the level of the 

 corpus callosum : on the right side the lateral ventricle is exposed. In 

 B the cerebral hemispheres are dissected down to a little below the level 

 of the anterior genu of the corpus callosum : only the frontal lobe of 

 the left hemisphere i ; retained, of the right a portion of the temporal 

 lobe also is left : the velum inter p^situm and pineal body are removed, 

 as well as the greater part of the body of the fornix, and the whole of 

 its left posterior pillar: the cerebellum is removed with the exception of 

 a part of its right lateral lobe. 



a.co, anterior commissure : a.fo, anterior pillar of fornix : a.pn, anterior 

 peduncles of cerebellum : b.fo, body of fornix : cb l , superior vermis 

 of cerebellum : cb", its lateral lobe : c.gn, corpus geniculatum : c.h, 

 cerebral hemisphere : ch.pl, choroid plexus : cp.cl, corpus callosum : 

 cp.s, corpus striatum : c.rs, corpus restiforme : d.p, dorsal pyramid : 

 _/?, flocculus : hp,m, hippocampus major : m.co, middle commissure : 

 0J 1 , nates: o.l 1 . testes : o.th, optic thalamus : o.tr, optic tract: p.co, 

 posterior commissure : p.fo, posterior pillar of fornix : pn, pineal body : 

 pd.pn, peduncle of pineal body \ p.pn, posterior peduncles .of cere- 

 bellum : p.va, fibres of pons Varolii forming middle peduncles of 

 cerebellum : sp.hi, septum lucidum : st.l, stria longitudinalis : t.s, tasnia 

 semicircularis : v.vn, valve of Vieussens : ^.3, third ventricle: ^.4, 

 fourth ventricle. 



B B 2 



