ORGANS OF SPECIAL SENSE. 



341 



FIG. 153. 



Nasal meatuses and accessory cavities. 1, right termination of the 

 left frontal sinus; 2, right frontal sinus; 3, probe extending from the 

 right frontal sinus through the infundibulum into the right nasal 

 fossa; 4, ethmoid cells; 5, large opening into the maxillary sinus; 6, 

 anterior antrum of the sphenoid bone; 7, posterior sphenoid antrum; 

 8, middle nasal meatus; 9, inferior meatus; 10, inferior turbinated 

 bone; 11, probe extending through the nasal duct. (Bishop.) 



