NASAL FOSSAE. 



773 



the groove of the vomer, as well as into the median ridge between the 

 superior maxillae. 



Fig. 531. OSSEOUS AND CARTILAGI- 

 NOUS SEPTUM OP THE NOSE, SEEN 

 FROM THE LEFT SIDE (from Ar- 

 nold). 



, right nasal bone ; 5, superior 

 maxillary bone ; c, sphenoidal sinus ; 

 d, perpendicular plate of the ethmoid 

 bone; e, vomer; 2*, inner part of the 

 right lower lateral cartilage ; 4, carti- 

 lage of the septum. 



This cartilage is the persistent 

 anterior extremity of the primor- 

 dial cranium. In young subjects 

 it is prolonged back to the body 

 of the presphenoid bone; and in 

 many adults an irregular thin 

 baud remains between the vomer 

 and the central plate of the 

 ethmoid. 



Fig. 531. 



NASAL FOSSAE. 



The nasal fossae, and the various openings into them, with the posterior 

 nares, have been previously described as they exist in the skeleton, and the 



Fig. 532. 



Fig. 532. TRANSVERSE VERTICAL SECTION OF TUB NASAL FOSS.E SEEN FROM BEHIND 

 (from Arnold). ^ 



1, part of the frontal bone ; 2, crista galli ; 3, perpendicular plate of the ethmoid ; be- 

 tween 4 and 4, the ethmoid cells ; 5, right middle spongy bone ; 6, left lower spongy bone; 

 7, vomer ; 8, malar bone ; 9, maxillary sinus ; 10, its opening into the middle meatus. 



greater part of that description is also applicable generally to the nose in a 

 recent state ; but it is proper to mention certain differences in the form and 



