THE SINUS MAXILLARIS 



121 



S.froivt. 



Cel.ettx.p 

 N. optic. 

 N.OCULO 

 N.troch 



Ce I. -Croat 



.trxf urtd 

 irvfurxcl. e 



rarvcj.se nil. 



Buct.na.l 



Ost.ma.X 



Art.caL.r.irU. 



S. spK 



FIG. 45. SPECIMEN FIFTEEN YEARS, NINE MONTHS, AND TWENTY-SIX DAYS 



OLD. (Series D, No. 76.) 



Lateral portions of the frontal, ethmoidal, maxillary, and sphenoidal areas 

 have been removed by sagittal incisions. Note the marked extent of the sinus 

 sphenoidalis into the pterygoid process. The ridge which is seen on the floor 

 of the sinus sphenoidalis overlies the nervus canalis pterygoidei (Vidii). The 

 sinus maxillaris extends 11 mm. below the level of the nasal floor. S.front., 

 Sinus frontalis; Cel.front., cellulse frontales; Cel.infund., cellulse infundib- 

 ulares; Infund.eth., infundibulum ethmoidale; Duct.na.lacr., ductus naso- 

 lacrimalis; Ost.max., ostiummaxillare; S.sph., the portion of sinus sphenoidalis 

 extending into the pterygoid area; Art. car. int., arteria carotis interna; 

 Gang. semi., ganglion semilunare; A.anom., anomalous branch of carotid 

 artery; N.troch., nervus trochlearis; N.oculom., nervus oculomotorius; ^V. 

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

 cellulae bullse ethmoidales. 



