SEPTUM, HIPPOCAMPUS, PALLIAL COMMISSURES 467 



Figs. 71 to 75 Bear (Ursus americanus). Five transverse sections from a 

 Weigert series. Magn. 2 diam. 



Fig. 71 Section through the interventricular foramen. The section cuts the 

 caudal border of the anterior commissure. The base of the neuroporic recess 

 is seen between the fornix columns. It extends forward through the whole thick- 

 ness of the anterior commissure (see figs. 72 and 90). Note the prominent striae 

 Lancisii. The fimbria is free from gray matter but a few cells accompany the 

 fornix superior. 



