THE SINUS MAXILLARIS 



99 



S.ma. x. 



FIG. 37. SPECIMEN FROM A CHILD NINE YEARS, TEN MONTHS, AND NINE- 

 TEEN DAYS OLD. (Series D, No. 65.) 



Anterior view of coronal section, cut 20 mm. posterior to the nasion, showing 

 the size and relations of the sinus maxillaris, the ostium maxillare, and its 

 manner of communication with the infundibulum ethmoidale, the bulla eth- 

 moidalis, processus uncinatus, and cellulaB ethmoidales anterior. Cr.gal., Crista 

 galli; Proc.unc., processus uncinatus; Infund.eth., infundibulum ethmoidale; 

 Ost.max., ostium maxillare; S.max., sinus maxillaris; N.infraorb., nervus in- 

 fraorbitalis; Cel.b.eth., cellula bulla ethmoidalis; Lam.papyr., lamina papyracea. 



