Fig. 32. HORIZONTAL SECTION OF CEREBRUM. FORNIX REMOVED. a, b, Divided 

 corpus callosum. c, Fifth ventricle, d, Right side of the septum lucidum. <?, Anterior 

 pillar of fornix descending to base of cerebrum. /, Velum interpositum. The choroid 

 plexuses have been renioved with the section of the cerebrum. Their divided extremities 

 show in the descending horns of the ventricle, g, Caudate nucleus, h, Lenticular 

 nucleus. ', Internal capsule. Note that the caudate and lenticular nuclei are continuous 

 with each other around the anterior portion of the internal capsule, j, Optic thalamus. 

 k, External capsule. /, Posterior pillar of fornix and fimbria. m, Hippocampus major. 

 n, Hippocampus minor, o, Eminentia collateralis. p, Anterior horn, g, Middle born. 

 r, Posterior horn of lateral ventricle, s, Within the fissure of Sylvius. The island of 

 Reil and its convolutions, x. x. Foramina of Monro. 



