VE TERINAR T DENTAL S URGER T. 59 



are twenty-four in number and are situated twelve 

 in each jaw. When viewed individually they present 

 marked differences. The first molar tooth in the 

 lower jaw is small, and, with the exception that it 

 has two roots, very much resembles a large remnant, 

 or wolf tooth of a horse. The teeth gradually in- 

 crease in size from the first to the sixth, which is 

 about three and one-half times wider from before 

 back than the first, and the wearing surface five 

 times wider from side to side. The table surface of 

 the lower molars is concave, the concavity amount- 

 ing to one-half inch at its center. The teeth of the 

 upper jaw are more even in size; the first being 

 three-fourths of an inch in width from before back, 

 and one-half inch from side to side, while the sixth 

 is one and one-fourth inches from before back, and 

 three-fourths inches from side to side. Their table 

 surfaces present a convexity which fills up the con- 

 cavity of the lower jaw when the mouth is closed. 



Their wearing surface is constructed on the same 

 principle as that of the horse's molars, except that 

 the eminences and depressions are more acute. There 

 is no special rule that is applicable to all the teeth, by 

 which the upper molars of the ox can be distin- 

 guished from the lower; however, a careful study of 

 each tooth will readily enable one to tell to which 

 jaw and alveolar cavity it belongs. The roots of all 

 the molar teeth point slightly backwards, and it is 



