THE CELLULE ETHMOIDALES 



59 



Ctai ng. semi 

 (Gasse-r 11 



Tor optic 

 .int. 

 Mac ul o m 

 N.troch: 



A. Car. in. -I. 



FIG. 21. SPECIMEN FROM A CHILD ONE YEAR, FOUR MONTHS, AND SEVEN 

 DAYS OLD. LATERAL VIEW OF FRONTAL, ETHMOIDAL, AND MAXILLARY 

 SINUS AREAS. (Series D, No. 14.) 



S. front., Sinus frontalis developing from a frontal cell; Infund.eth., infundib- 

 ulum ethmoidale; Fo8.8oc.locr., fossa sacci lacrimalis; Ost.max., ostium 

 maxillare; N.abduc., nervus abducens; A. car. int., arteria carotis interna; 

 Gang. semi,, ganglion semilunare (Gasseri); N.troch., nervus trochlearis; 

 N.oculom., nervus oculomotorius; For.optic., foramen opticum; Cel.eth.post., 

 cellulae ethmoidales posterior; Cel.eth.ant., cellulse ethmoidales anterior. 



