EMBRYOLOGIC CONSIDERATIONS 



23 



Ca.rt.caup a < 



FIG. 3. DIAGRAM DRAWN FROM A CORONAL SECTION THROUGH NASAL AREA 

 OF A SIXTY-DAY EMBRYO, 0.45 MM. POSTERIOR TO THE SECTION SHOWN IN 

 FIG. 2. (Series A, No. 1, slide 6, section 6. X 16%.) 

 Sept.na., Septum nasi; note relative thickness at this stage of development; 

 C.inf., concha inferior; Proc.pal., processus palatinus of maxilla; Org.vom., 

 organon vomeronasale (Jacobsoni); Cart.cap.na., cartilage capsulae nasalis. 



FIG. 4. DIAGRAM DRAWN FROM A CORONAL SECTION THROUGH NASAL AREA 

 OF A SIXTY-DAY EMBRYO, 0.25 MM. POSTERIOR TO SECTION SHOWN IN FIG. 3. 

 (Series A, No. 1, slide 7, section 4. X 16%.) 



C.med., Concha media (note that cartilage has not yet developed in this 

 portion of concha); C.inf., concha inferior; Proc.pal., processus palatinus of 

 maxilla; Sept.na., septum nasi; Cart.cap.na., cartilage capsulae nasalis. 



