50 ELEMENTS OF MAMMALIAN ANATOMY 



The maxilloturbinal is a paired bone occupying the anterior 

 portion of the nasal cavity (Fig. 19). It is composed of a few 

 scrolls which, when the nasal bone is removed may be seen 

 attached to the maxillary. It consists of a horizontal longitu- 

 dinal plate, whose lateral border is fixed to the maxillary while 

 the medial border bifurcates into a dorsal curved plate and a 

 ventral scroll. The space between the maxilloturbinal and 

 cranial portion 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 ethmoid. 



Fig. 20. — 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 or mandibular foramen; in, inferior notch; 

 mol, molar tooth; prtn, premolar teeth; dt, diastema; stn, surface of symphysis; up, 

 superior notch. 



• The nasal bone, joining with its fellow in the median line, 

 forms a large part of the roof of the nasal chamber. It articu- 

 lates 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 on the 

 cranial 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 na so -lachrymal canal is bounded by the lachrymal and the 



