EMBRYOLOGIC CONSIDERATIONS 



37 



C. sup. 



C me a 



C.inf 



FIG. 10. DIAGRAM DRAWN FROM A CORONAL SECTION THROUGH THE MIDDLE 

 THIRD OF THE NASAL AREA OF A ONE-HUNDRED-DAY EMBRYO. (Series A, 

 No. 8, slide 14, section 4. X 10.) 



Sept.na., Septum nasi; C.acces., concha accessoria, a fold which bears a 

 relation to the meatus superior somewhat similar to that which the bulla 

 ethmoidalis bears to the meatus medius. The concha accessoria, however, 

 is not always so distinctly marked. B.eth., posterior end of bulla ethmoidalis; 

 C.inf., concha inferior; C.med., concha media (note the inferior and medial 

 grooves in the cartilage of this concha); C.sup., concha superior. 



