THE CELLULJE ETHMOIDALES 



73 



H. semi. 



Ce.l .et K. 



C rrved. (cu-t surf 

 C. sup. 



C. Supr.I. 

 S.spK. 



H y po pVx, 



C-el.irxfund- 

 Aq. na- 



B. e.tK 



P roc. 



Seplr.spK. 



cjr Ton,. pKa-r. 



Ost.tub.a-ud. 



C.xn.1 1 



O s-t. menx . 



FIG. 27. SPECIMEN FROM A CHILD FIVE YEARS, TEN MONTHS, AND TWENTY- 

 TWO DAYS OLD. (Series D, No. 45.) 



Sagittal section, % mm. to the right of median line anteriorly; section 

 through body of the sphenoid 2 mm. to the right of median line. Anterior 

 portion of concha media has been removed to show the lateral nasal wall. 

 Medial wall of an infundibular cell was removed with the anterior attachment 

 of the concha media. Ostium frontale in this case communicates both with 

 infundibulum and with the recessus conchalis medial to the processus un- 

 cinatus. Dotted line indicates outline of sinus frontalis. H.semi., Hiatus 

 semilunaris; Cel.eth.post., cellula ethmoidalis posterior, extending into concha 

 media; C.med., concha media (cut surface) ; C. sup., concha superior; C.supr.I, 

 concha suprema I ; S.sph., sinus sphenoidalis; Hypoph., hypophysis; Sept.sph., 

 septum sphenoidale (anterior portion); Ton.phar., tonsilla pharyngea; Ost. 

 tub. and., ostium pharyngeum tuba? auditive; Ost.max.acces., ostium maxillare 

 accessorium; C.inf., concha inferior; Proc.unc., processus uncinatus; B.eth., 

 bulla ethmoidalis; Ag.na., agger nasi; Cel.infund., cellula infundibularis. 



