The Sinus Maxillaris in Man. 353 
Fic. 27. Diagrams of the lateral nasal wall. The conche nasales medize 
have been partially cut away so as to bring to view the underlying structures. 
Note the positions and varying sizes of the ostium maxillare accessorium in the 
different diagrams. The accessory ostia are designated by the deep black circles. 
The upper and lower right hand diagrams show two accessory ostia and the others 
but one. 
