THE SINUS MAXILLARIS 



95 



S.I ront 



Ost.froivt. 

 C e 1. i at u r\ d. 



Fos.se^c. 



Cel.e-tK.arvt. 



Cel.e-th.post. 



optic. 



FIG. 35. SPECIMEN FROM A CHILD EIGHT YEARS, EIGHT MONTHS, AND ONE 



DAY OLD. (Series D, No. 63.) 



Lateral view of frontal, ethmoidal, and maxillary sinus areas, the lateral 

 portion of each having been removed by sagittal cuts. Note that the sinus 

 frontalis developed directly from the infundibulum ethmoidale. Note also 

 the incomplete septa in the sinus maxillaris. Cel.eth.ant., Cellulse ethmoidales 

 anterior; Cel.eth.post., cellulae ethmoidales posterior; N .optic., nervus opticus; 

 Sept.max., septulae maxillares; Ost.max., ostium maxillare; Fos.sac.lacr., 

 Fossa sacci lacrimalis; Cel.infund., cellulse infundibulares; Ost.front., ostium 

 frontale; S.front., sinus frontalis. 



