THE CELLULE ETHMOID ALES 



69 



C.ltxt. 

 Vomer 



FIG. 25. SPECIMEN FROM A CHILD, THREE YEARS FIVE MONTHS, AND EIGHT 



DAYS OLD. (Series D, No. 32.) 



Posterior view of coronal section cut 28.5 mm. posterior to nasion, showing 

 the extent of lateral and supero-inferior development of sinus maxillaris, the 

 osseous ridge beneath nervus infraorbitalis, cellulse ethmoidales posterior, 

 and small conchal cells developing in each concha nasalis superior. The ostia 

 maxillaria are larger than usual in the anteroposterior diameter. Note de- 

 flection of septum nasi and its influence on each concha media. C.sup., 

 Concha superior; Cel.eth.post., cellulse ethmoidales posterior; C.med., concha 

 media; N.infraorb., nervus infraorbitalis; C.inf., concha inferior; Proc.unc., 

 processus uncinatus; Cart.sep.na., cartilago septi nasi; Lam. perpend., lamina 

 perpendicularis. 



