468 



J. B. JOHNSTON 



C.C. 



Fig. 72 Section through the hippocampal commissure, fornix columns and 

 neuroporic recess. 



Fig. 73 Section 2.15 mm. rostral to the last. The zona limitans is sharply 

 marked by the precommissural fibers as in the opossum and rabbit. Islands of 

 Calleja come up to this level as in the other forms. 



