3$ ELEMENTS OF MAMMALIAN ANATOMY. 



dorsal curved plate and a ventral scroll. The space between 

 the maxilloturbinal and cranial portion of the lateral eth- 

 moid is the middle nasal meatus. The maxilloturbinal bone 

 in man receives the name of the inferior turbinated, in dis- 

 tinction to the middle and superior turbinated bones, con- 

 stituting the lateral ethmoid. 



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 

 cranial part of the nasal walls of the orbits. Each articu- 

 lates 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 lachry- 



FIG. 19. MEDIAL OR INNER ASPECT OF THE MANDIBLE. 

 ang, Angle; cndyl, condyle; cor. pr, coronoid process; can, canine tooth ; 

 inc, incisor teeth; inf. d. fm, inferior dental foramen; in, inferior 

 notch; mol, molar tooth; prm, premolar teeth; dt, diastema; sm, 

 surface of symphysis ; up, superior notch. 



mal and the maxilla. This canal, beginning in a vertical 

 groove, the lachrymal groove, carries the duct permitting 

 the tears to pass from the eye into the nasal chamber (Fig. 

 16). 



