THE LATERAL VENTRICLES. 



5.0 



Fig. 88. VIEW OF THE LATERAL VENTRICLE FROM ABOVE. Natural size. (E. A. S. and Q-. D. T.) 



The preparation was made with the brain in situ (hardened). The skull cap and membranes having 

 been removed, the brain was sliced down to the level of the corpus callosum. The left lateral ventricle 

 was then opened by cutting away its roof, and the island exposed by slicing away the opercula. The 

 drawing is made from a photograph. 



I.R. , insula Reilii (the line points to the middle of the three gyri breves) ; s.c. , sulcus centralis 

 insulse ; g.L, gyrus longus insulse ; c.c., corpus callosum ; n.L., nerves of Lancisi ; str.t., stria tecta ; 

 /.mi., forceps minor; /.;., forceps major; c.a., cornu anterius of ventricle; c.p., cornu posterius ; 

 c.i., entrance to cornu inferius ; f.M., foramen Monroi ; s.M., sulcus leading backwards to the foramen 

 Monroi ; c.str., corpus striatum ; th.opt., thalamus opticus, anterior tubercle ; pl.ch., plexus choroides ; 

 /, fornix ; /', its anterior pillar; h, posterior end of hippocampus major; tri., trigonum ventriculi ; 

 calcar, calcar avis. 



