512 C. JUDSON HERRICK 



EXPLANATION OF FIGURES 



12. Section .8 mm. faithei caudad through the middle of the septum. 



13. Section .3 mm. farther caudad. 



14. Section immediately rostral to the interventricular foiamen, through the 

 septum ependymale. 



15. Section through the interventricular foramen. 



16. Section through the rostral part ot the anterior commissure ridge immedi- 

 ately caudal to the interventricular foramen. 



17. Section through the caudal part of the anterior commissure ridge. 



