THE SINUS MAXILLARIS 



105 



S.trorvt: 



pK. 



FIG. 40. SPECIMEN FROM A CHILD ELEVEN YEARS OLD. (Series D, No. 68.) 

 Sagittal section showing the conchse nasales, the sinus sphenoidalis, the 

 septum frontale, and the portion of the left sinus frontalis extending to the 

 right of the median line. S.sph., Sinus sphenoidalis; Hypoph., hypophysis; 

 Ost.tub.aud., ostium pharyngeum tubse auditivse; M.inf., meatus inferior; 

 M.med., meatus medius; M.sup., meatus superior; S.front., sinus frontalis. 



