210 COMPARATIVE DENTAL ANATOMY 



Lenticular Jaws. The serrated maxillae of the leech 

 and other worms. 



Lingual. Situated near or toward the tongue, as the 

 lingual surface of a tooth. 



Lobe. A division of a tooth crown formed from a 

 distinct point of calcification. 



Lopkodont. Summit of a tooth crown thrown into 

 transverse or longitudinal folds. 



Macrodont. Having large teeth. 



Mandible. The lower jaw. 



Mastax. The muscular pharynx of a rotifer, contain- 

 ing the jaw parts. 



Mastication. The process of comminuting the food 

 with the teeth — synchronous with insalivation. 



Maxilla (PI. Maxillce.) The upper jaw or jaw-bone. 



Maxillary. Of or pertaining to a jaw or jaw-bone. 



Median. Middle, as the median line of the body. 



Mesial. Toward the median line of the face (follow- 

 ing the curve of the dental arch). 



Mesocephalic. A term applied to a skull having a ca- 

 pacity between 135 and 145 c.c. 



Mesodont. Having medium sized teeth. 



Mesognathous. Having a moderate or intermediate 

 gnathic index of from 98 to 103 — as a skull. 



Metacone. The disto-buccal cone (or cusp) of the 

 upper molars. 



Metaconid. The mesio-lingual cone (or cusp) of the 

 lower molars. 



Microdont. Applied to small-toothed races. 



Molar. A grinding tooth with multi-cusped crowns. 



Monophyodont. An animal having but one set of 

 teeth, i.e., the first set not being shed, but remaining per- 

 manently. 



