THE SINUS MAXILLARIS 



117 



oph.. 



Toa.pHa.rj 



FIG. 43. SPECIMEN FOURTEEN YEARS AND SEVEN MONTHS OLD. (Series D. 



No. 73.) 



Sagittal section, cut 4 mm. to the right of the median line, thus removing 

 the medial portions of the concha inferior and concha media, and the medial 

 anterosuperior portions of the concha superior and concha suprema I. The 

 relations of the structures forming the lateral nasal wall and the positions of the 

 ostia of the cellule ethmoidales are thus clearly shown. 1., Probe through 

 ostium frontale; B.eth., bulla ethmoidalis; Cel.eth.post., cellulse ethmoidales 

 posterior; 2., probe through ostium of most posterior ethmoidal cell; S.sph., 

 sinus sphenoidalis; Hypoph., hypophysis; C.supr. I, concha suprema I; C.sup., 

 concha superior; Ton.phar., tonsilla pharyngea; Ost.tub.aud., ostium pharyn- 

 geum tubae auditivse; C.inf., concha inferior; C.med., concha media; H.semi., 

 hiatus semilunaris; Proc.unc., processus uncinatus. 



