Concha nasalis 



' I 



Concha tiasalis 

 superior 

 Concha nasa/is 



^ , "?^"'''" Ti.ba iud i ti ua 



Concha nasa/is 



inferior 



28 



Descending crura of 

 ethmoidal conchae 



Stnus sphenoidali 



Furrow on medial sur- 

 face of concha media 



-~^J 



29 



Lobuli 



Agger nasi 



Figs. 28, 29, 30 Drawings of specimens of the lateral wall of the nasal cavity 

 from the anatomical series. Cornell University. 



Fig. 28 (X 1.8) From a 190-day fetus. Note especially the rudimentary char- 

 acter of the concha superior. The accessory concha of the superior meatus cannot 

 be seen. 



Fig. 29 (X 1.2) From a 235-day fetus. Note the marked differentiation into 

 descending crura of the ethmoidal conchae. The ascending crural mass is as yet 

 undifTerentiated. 



Fig. ?0 (X 1.2) From a 210-day fetus. Note especially the lobuli on the eth- 

 moidal conchae. 



