TEETH OF THE PIG 



Fig. 50. — Photograph from preparations ol tlie upper and lower 

 jaw of a Pig, to show the teeth in position. The bone 

 has been cut away so as to show the roots or fangs of the 

 teeth. (1, 2, 3) the three upper incisor teeth of the left 

 side ; (4) the upper canine tooth of the left side ; (5, 6, 7, 8) 

 the four front molars or cheek teeth, called the premolars, 

 of the left side of the upper jaw ; (9, 10, 11 ) the tliree back 

 molars (not preceded by " first " teeth) of the left side 

 of the upper jaw; (12, 13, 14) the three lower incisor 

 teeth of the left side ; (15) the canine of the lower jaw, 

 left side : note its enormous root ; (16, 17, 18, 19) the 

 four front molars (premolars) of the left side of the lower 

 jaw ; (20, 21, 22) the three back molars (not preceded by 

 *' first " teeth) of the left side of the lower jaw. 



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