Frontal sinus 



PLATE VIII 



, Frontal sinus 



Supra-orbital 

 " margin 



.Ethmoidal cell 



Coronoid proces 

 of mandibl 



Middle concha 

 Inferior concha 



_jTip of mastoid 

 I process 



Maxillary sinus 



FIG. 89. Antero-posterior radiograph of Living Skull. (Gouldesbrough. ) 



