THE SKELETON. 53 



the maxillary, in the median line. This bone, with the 

 mesethmoid and its cartilage, forms the nasal septum, 

 dividing the nasal cavity into two chambers. It is best 

 demonstrated by removing the palatines, when it may 

 be seen extending cephalad from its bifurcated articula- 

 tion with the presphenoid to its articulation with the 

 premaxillaries. The caudal portion of the bone is ex- 

 panded horizontally and articulates with the ventral eth- 

 moturbinals. Its dorsal margin is bifurcated for articu- 

 lation with the mesethmoid. 



The maxilloturbinal is a paired bone occupying the 

 anterior portion of the nasal cavity (Fig. 18). It is com- 

 posed of a few scrolls which, when the nasal bone is 

 removed, may be seen attached to the maxillary. It 

 consists of a horizontal longitudinal plate, wiiose lateral 

 border is fixed to the maxillary wliile the mesal border 

 bifurcates into a dorsal curved plate and a ventral scroll. 

 The space between the maxilloturbinal and cephalic por- 

 tion of the lateral ethmoid is the middle nasal meatus. 

 The maxilloturbinal bone in man receives the name of 

 the inferior turbinated, in distinction to the middle and 

 superior turbinated bones, constituting the lateral eth- 

 moid. 



The nasal bone, joining with its fellow in the median 

 line, forms a large part of the roof of the nasal chamber. 

 It articulates with the premaxillary, maxillary, and 

 frontal on the surface, and the ethmoid within the nasal 

 chamber. 



The lachrymal bones are two in number and lie in the 

 cephalic part of the nasal walls of the orbits. Each 

 articulates with the maxillary, frontal, os planum of 

 the ethmoid, and the malar. The bone has about half 

 of the area of the finger-nail. The lachrymal canal is 

 bounded by the lachrymal and the maxilla. This canal, 



