536 C. JUDSON HEKKICK 



EXPLANATION OF FIGURES 



65. Immediately ventral to the interventricular foramina, illustrating the way 

 in which the precommissural body forms the '"bed" of the eommissura pallii an- 

 terior and eommissura anterior, the latter crossing immediately ventrally of the 

 point designated. 



06 to 70. Sections from a transverse series through the brain of young Alligator 

 mississippiensis about 2o cm. long, stained by the method of Ramon y Cajal. 

 X 15. 



66. Through the caudal part of the septum, illustrating its medial and lateral 

 nuclei and their relations to the primordium hippocampi. 



