THE RABBIT. 



Fig, 71. — Lepus cuniculus. Two dissejtions of the brain, from 

 above (nat. size). 



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

 corpui 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 corpns callosum ; only the frontal lobe of 

 the left hemisphere is retained, of the rijht a portion of the temporal 

 lobe also is left : the velum interpositum and pineal body are removed, 

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

 its left posteri:)r pillar : the cerebellum is removed vfith 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, hoiy of fornix : cb^, superior vermis 

 of cerebellum : cb'', its lateral lobe: c.g?t, corpus geniculatum ; c./i, 

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

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

 Jl, flocculus : hp,m, hippocampus major ; m.co, middle commissure : 

 0.1^, nates: o.l', testes: o.th, optic thalamus: o.tr, optic tract: p.co, 

 Jjosterior 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: j/./», septum lUcidiim : j^./,. stria longitudinalis : ^.j-, taenia 

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

 fourth ventricle. 



B B 2 



