54 VETERINARY DENTAL SURGERT. 



If we make the divisions, premolars (deciduous), 

 and molars, then the rule will still hold good, for a 

 pair in each group makes its appearance at the same 

 time; but as has been stated, veterinarians designate 

 all back teeth as molars, and it is the intention 

 use that term only in this work. 



In describing the periods at which permanent den- 

 tition takes place, diagrams will be used which rep- 

 resent one-half of the mouth as in figure 15. 



The incisors being numbered i, 2, 3 central, lat- 

 eral and corner and the molars in their order from 

 before backwards i, 2, 3, 4, 5, 6. 



The dentition of the colt at ten months old is 

 temporary and is represented thus: 



Incisors. Molars. 



J 3 > 3- !> 2 > 3- 



Permanent dentition is as follows: T, denoting 

 temporary, and P, permanent teeth. 



Incisors. Canine. Molars. 

 T 2 > 3- ! i 2, 3, 4, 5, 6. 



One year . . . . T T T PTTPOO 



Two years.. T TT PPTPOP 



Three years. P TT PPPPPO 



Four years.. P PT P PPPPPP 



Five years.. P PP P PPPPPP 



At five years these teeth are all up and in wear ; 



the colt then becoming a horse and the filly a mare. 



The incisor teeth will average about two and a 



