340 



DIGESTIVE SYSTEM OF THE HORSE 



The Teeth of the Horse 



The Permanent Teeth 

 The formula of the permanent teeth of the horse is: 



(3 1 3 or 4 3 \ 

 I - C - P M - ) 

 3 13 3/ 



I' 



Fig. 244.— Upper Teeth of Horse, About Four and One-half Fig. 245.— Lower Teeth of Hokse, 



Vkahs Old. Four Years of Age. 



/'. P, P, Incisors; C, cani,.e; Z^', I-^, ps, Jm^ premolars; .\P, M\ M^ /., /^ First and second permanent 



molars. incisors; /J/s, third deciduous incisor. The 



cheek teeth are numbered according to 

 pojjular usage. 



In the mare the canines usually are very small and do not erupt, reducing the num- 

 ber to 36 or 38." 



'Ellcnberger found, a.s the result of oxtonsivp oh.servation.s (SOOO subjects), that about 

 ^ to 6 per cent, of nuuv.s have erupted canines in both jaws; tliat 6 to 7 per cent, have them in 

 the upper jaw; while 20 to 30 per cent, have them in the lower jaw. 



