THE SINUS MAXILLARIS 



93 



R.ee. sph.. etH. 

 S. sph.. 



Hypoph.. 



Totx.ph.o-r. 



Ost.tub.aud. 



FIG. 34. SPECIMEN FROM A CHILD EIGHT YEARS, EIGHT MONTHS, AND ONE 



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



Sagittal section cut 1 mm. to the right of median line. Pneumatization of 

 the sphenoid bone is less extensive than is usually found at this age. (Com- 

 pare with Figs. 27, 29, and 31.) S.front., Sinus frontalis; Rec.sph.eth,, recessus 

 sphenoethmoidalis; S.sph., sinus sphenoidalis; Hypoph., hypophysis; Ton. 

 phar., tonsilla pharyngea; F.phar.bas., fascia pharyngobasilaris; Ost.tub.aud., 

 ostium pharyngeum tuba? auditivse. 



