THE SINUS MAXILLARIS 



101 



Ost. iront 

 .cut surf a. ce 



S.spK 



FIG. 38. SPECIMEN FROM A CHILD TEN YEARS, ONE MONTH, AND SEVEN 



DAYS OLD. (Series D, No. 66.) 



Sagittal section 1 mm. to the left of the median line. The anterior portion 

 of the concha media and a portion of the medial wall of the sinus frontalis have 

 been removed. Note that sphenoidal pneumatization has extended beneath 

 the anterior portion of the sella turcica. S.front., Sinus frontalis; Proc.unc., 

 processus uncinatus; B.efh., bulla ethmoidalis; C.inf., concha inferior; Ost. 

 tub. and., ostium pharyngeum tubse auditivse; Ton.phar., tonsilla pharyngea; 

 S.sph., sinus sphenoidalis; C.supr.I, concha suprema I; C.sup., concha su- 

 perior; C.med., concha media; Ost. front., ostium frontale. 



