THE SINUS MAXILLARIS 



125 



rnuoo us cysts 



FIG. 47. SPECIMEN SIXTEEN YEARS, FIVE MONTHS, AND TWENTY-ONE DAYS 



OLD. (Series D, No. 79.) 



Lateral view of frontal, ethmoidal, maxillary, and a portion of the sphenoidal 

 areas. Maxillary sinus contains mucous cysts. The ridge which is seen on 

 the floor of the sphenoidal sinus overlies the nervus canalis pterygoidei (Vidii). 

 Note the extent of sphenoidal sinus into the pterygoid area, also the extent of 

 an infundibular cell far into the frontal process of the maxilla. Cel.b.eth., 

 Cellulse bullse ethmoidales; Cel.eth.post., cellulae ethmoidales posterior; S. 

 sph., sinus sphenoidalis; Lam.lat., lamina lateralis processus pterygoidei; 

 Ost.max., ostium maxillare; Duct.na.lacr., ductus nasolacrimalis; Cel.infund., 

 cellulse infundibulares; S. front., sinus frontalis. 



