THE SINUS MAXILLARIS 



127 



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Proc.urxc. 

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FIG. 48. SPECIMEN SEVENTEEN YEARS OLD. SAGITTAL SECTION 1 MM. TO THE 



LEFT OF THE MEDIAN LINE. THE SEPTUM NASI AND THE ANTERIOR PORTION 



OF THE CONCHA MEDIA HAVE BEEN REMOVED. (Series D, No. 83.) 



Note the presence of two accessory ostia maxillaria. Similar ostia were 



found opening into the left sinus maxillaris of this case. Both sinus maxillares 



contained mucous cysts near the accessory ostia. 1, Probe in ostium frontale; 



2 and 5, probes in the ostia of cellulse ethmoidales posterior; 4, probe through 



ostium sphenoidale; H.semi., hiatus semilunaris; B.eth., bulla ethmoidalis; 



C.supr.I, concha suprema I; S.sph., sinus sphenoidalis; Ton.phar., tonsilla 



pharyngea; Ost.mox.acces., ostia maxillaria accessoria; C.inf., concha inferior ; 



C.med., concha media; Proc.unc., processus uncinatus; S.front., sinus frontalis 



(medial portion of left sinus extending slightly to the right of median line) . 



