STKtJCTURE OF THE HORSE. 



113 



The crown is somewhat conical, the base being at the gums. 

 They have no constricted neck, and the fang is single. In the 

 horse tribe, as a rule, canine teeth are developed only in the 

 male; if they exist in the female, they are rudimentary. The 

 molars, or grinders, are twelve in the temporary set, three in 

 each side of each jaw; twenty-four in the permanent set, six on 

 each side, above and below; they are numbered from front back- 

 wards, and, like the incisors, those of the upper jaw are the 

 larger. The horse may have supplementary molars, or Avolf 

 teeth; these are small and placed one on each side of the jaw, 

 anterior to the first molars; they are usually shed with the milk 

 teeth. 



INDICATIONS OF AGE. 



The horse's age may be determined with considerable exact- 

 ness by studying the peculiarities which characterize the teeth 



Fig. 7— Upper Incisor Teeth of a One Year 

 Old Colt Showing the Restricted Necks of 

 Milk Teeth. 



1, 1. Central incisors in wear. Z, 2. Lat- 

 eral incisors in wear. S, S. Corner in- 

 cisors in wear. At one yrnr all the in- 

 cisors are up and in wear. 



Fig. S — Upper Incisors of a Two Year and 

 Six Months Old Colt. 



1, J. Showing the two central milk teeth 

 shed a7id the two permanent ones coining 

 in their place. 2, 2, Milk teeth. S,S. 

 Milk teeth corner. 



at different periods of life. • At or soon after birth the foal has 

 four incisors and twelve molars. The a])pearance of the incisoi*3 

 at birth depends upon the length of time the foal is carried; it 

 may be carried over the time or be born before the time of their 

 appearance. At an age varying from six to nine weeks, the mid- 

 8 



