THE FACE, MOUTH AND PHARYNX 201 



fracture of the maxilla, there is every likelihood of surgical 

 emphysema, unless the patient is warned against blowing his 

 nose. 



The Ethmoidal Air-Cells are all situated in the ethmoidal 

 labyrinth (lateral mass), and are only separated from the orbit 



FIG. 59. Empyaema of the Left Frontal Sinus. 



by the thin lamina papyracea (os planum). On the medial 

 surface of the labyrinth are the projections which form the 

 superior and middle conchse (turbinated bones). The anterior 

 and middle ethmoidal cells open into the middle meatus, and 

 the posterior open into the superior meatus of the nose. 



The Sphenoidal Sinuses are situated in the body of the 

 sphenoid and immediately below the fossa which lodges the 



