THE CELLULE ETHMOIDALES 



51 



C.medixjsccut 

 C.sup. 

 C.supr.l. 

 C.supr.ll 



Proc.un.0.-^^ 



FIG. 16. SAGITTAL SECTION, MEDIAN ANTERIORLY, POSTERIORLY 1% MM. 



TO THE RIGHT OF MEDIAN LINE. (Fetus one hundred and eighty-eight days 



old. Series B, No. 4.) 



The greater portion of the concha media has been removed in order to show 

 the relations of the recessus conchalis, processus uncinatus, hiatus semilunaris, 

 and bulla ethmoidalis. This specimen shows the presence of five conchae 

 ethmoidales, the only specimen in the entire series having so great a number. 

 Note the extent of development of the sinus sphenoidalis. C.med., Concha 

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

 C.supr.ll, concha suprema II; C.supr.ll I, concha suprema III; S.sph., 

 sinus sphenoidalis; Cap.nas.post., capsula nasalis posterior; Ost.tub.aud., 

 ostium tubae auditivse; Ton.pal., tonsilla palatina; C.inf., concha inferior; 

 Proc.unc., processus uncinatus; B.eth., bulla ethmoidalis; Ag.na., agger nasi. 



