

THE FORE-BRAIN OR PROSENCEPHALON 



839 



sure, and each descends through the gray substance in the lateral wall of the third 

 ventricle to the base of the brain, where it ends in the corpus mammillare. From 

 the cells of the corpus mammillare the thalamomammillary fasciculus (bundle of Vicq 



ANT. PILLARS 

 OF FORNIX 



HIPPOCAMPUS 



FIQ. 747. Diagram of the fornix. (gpitzka.) 



Cavity of septum pdlucidum 

 Optic chiasma 



Optic nerve 



Tuber cinereum 



Optic tract 



Corpora 

 'mammillaria 



Carpus 



callosum 



(under surf ace) 



Fimbria 

 hippocampi 



FIG. "48. The fornix and corpus callosum from below. (From a specimen in the Department of Human 

 Anatomy of the University of Oxford.) 



d'Azyr] takes origin and is prolonged into the anterior nucleus of the thalamus. 

 The column of the fornix and the thalamomaimnillary fasciculus together form a loop 

 resembling the figure 8, but the continuity of the loop is broken in the corpus 



