THE SINUS MAXILLARIS 



85 



Cel.b.etH. 



S.trorvt. 



N. op tic 

 N.opKtKa.1 



N.ooulo ra 

 N.troch. 



Cel.itMun.ct. 



Fos. s<i.c..la.c.r. 



Os-t.m-a.x- 

 s-t. max . acce. 



nxucous c. 



ysts 



FIG. 30. SPECIMEN FROM A CHILD Six YEARS, TEN MONTHS, AND TWENTY 

 DAYS OLD. BY SAGITTAL SECTIONS THE LATERAL PORTIONS OF THE 

 FRONTAL, ETHMOID AL, AND MAXILLARY AREAS HAVE BEEN REMOVED. 

 (Series D, No. 53.) 



The osseous ridges on the medial wall of the sinus maxillaris are unusually 

 prominent. The largest one overlies the ductus nasolacrimalis. There were 

 two lacrimal sacs present, the superior portion of the duct lacing bifid. Note 

 presence of ostium maxillare accessorium and the proximity of the mucous 

 cyst. S.front., Sinus frontalis; Cel.infund., cellulse infundibulares; Fos.sac. 

 lacr., fossae sacci lacrimales; Ost.max., ostium maxillare; Ost.max.acces., 

 ostium maxillare accessorium; N.max., nervus maxillaris; N.mandib., nervus 

 mandibularis; Gang. semi., ganglion semilunare (Gasseri); N.abduc., nervus 

 abducens; A.car.int., arteria carotis interna; N.troch., nervus trochlearis; 

 N.oculom., nervus oculomotorius; N.ophthaL, nervus ophthalmicus; N.optic., 

 nervus opticus; Cel.eth.post., cellulse ethmoidales posterior; Cel.b.eth., cellula 

 bullae ethmoidalis. 



