THE SINUS MAXILLARIS 



115 



med. 

 .b.etH. 



Proo.-urvc.. , 



SeptcU rtdqe 



C.inf. 



FIG. 42. SPECIMEN FROM A CHILD THIRTEEN YEARS, Six MONTHS, AND NINE- 

 TEEN DAYS OLD. (Series D, No. 72.) 



Posterior view of a, coronal section 31 mm. posterior to the nasion, showing 

 maxillary sinuses, bullar and posterior ethmoidal cells. Note the influence 

 of septal ridge and deviation of septum upon the form of each concha media; 

 also upon the degree of medial inclination of each processus uncinatus, thus 

 producing a marked difference in the width of the hiatus semilunaris and the 

 infundibulum ethmoidale of each side. Cr.gal., Crista galli; Cel.eth.post., 

 cellulse ethmoidales posterior; C.med., concha media; Cel.b.eth., cellula bullse 

 ethmoidalis; Proc.unc., processus uncinatus; C.inf., concha inferior; S.max., 

 sinus maxillaris; C.sup., concha superior. 



