PLEXUS MEOIALtS 



PLEXUS MEDIAUS 



H "WGE"'NUS 



CAPITIS PRIMA 



PLEXUS POST 



PLEXUS POST. 



FORAMEN 

 fjUGULARE 



SIN. RECTUS 

 SIN. SAGITTALIS SUP. 



PLEXUS ANT. 



StN. TRANSVERSUS 



SIN, TRANSVERSUS 



SIN RECTUS 



SIN. TRANS. V. OPTHAL 



PARS SIGMOID. 



175 



