ANIMAL DENTISTRY. 



63 



and at two and a half years it is found on a level with the 

 fourth. 



Sixth Molar — The sixth molar is the last of the molars 

 to erupt, which event occurs at any time between four and 

 five years of age. Its formation, like that of the other per- 

 manent molars, having no temporary predecessors, depends 

 upon the backward growth of the common enamel germ. 

 The first evidence of this molar is seen at two to two and 



Fig. 4S. 

 Molar Denture of the Ox at lo Months. 



a half years in the form of a rounded mass similar to that 

 of the fourth and fifth. At this age the jaw is more un- 

 yielding and its eruption may be delayed by the resistance 



offered therefrom. 



RUMINANTS. 



Central Incisor— Reaches the alveolar margin at one 

 year and erupts at one and a half years. 



