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A MANUAL OF DENTAL ANATOMY. 



which has become transformed into a great many subsidiary 

 tubercles. 



That such is a correct interpretation of its nature is indi- 

 cated by our being able to trace the four principal cusps, 

 though modified and not divided off, in the front part of the 

 tooth, of which, however, they do not constitute more than 

 a small part. Those Ungulates in which the surfaces of the 

 molar teeth are covered by rounded or conical cusps, are 

 termed " bunodonts," in contradistinction to those which 

 present crescentic ridges on the masticating surface of their 

 molars, and which go by the name of " selenodonts." 



In the Wart-hog (Phacoehrerus), the genus with very large 



canines, the disproportion between the last true molar and 

 the other teeth is yet more striking. 



(*) Upper and lower teeth of Phacochoerus. In the tipper jaw, the last 

 two premolars, and the much- worn first true molar remain. In the lower 

 all have been shed off, save the last two true molars. From a specimen 

 in the Museum of the Royal College of Surgeons. 



