V 



Fig. 9. INTERIOR OF THE BASE OF THE SKULL, TENTORIUM IN PLACE. i, Crista 

 galli and attachment of falx cerebri. 2, Olfactory bulb. 3, Optic nerve. 4, Middle cere- 

 bral artery. 5, Posterior communicating artery. 6, Infundibulum and pituitary gland. 

 7, Third nerve. 8, Posterior cerebral artery. 9, Crusta of crus cerebri. 10, Tegmentum 

 of same. Between them is the locus niger. n, Attachment of the falx cerebri divided 

 close to the tentorium cerebelli. 12, Lateral sinus. 13, Tentorium cerebelli. 



