Lamina Cribrosa 



Groove for 

 Lateral Sinus 



Foramen Magnum 



Groove for Transverse 

 Portion of Lateral Sinus 



(Torcular Hbhophili) 

 Internal Occipital Protuberance 



Pig. 14. Base of Skull - seen from above. 



Vs Nat. Size. 



Rebraan Limited, Londou. 



Kebman Company, New York. 



