118 HORSEMAN SHIP. 



than the teeth. In the colt, the front teeth or nippers 

 have reached their maturity at twelve months old, and 

 are six in number. The hollow and black cavities in 

 the middle of the teeth now begin to denote the age. 

 At one year old, the marks in the two middle teeth are 

 nearly ground down. At one year and a half, they will 

 be all but extinct, and the whole of the nippers will 

 have worn away the outer or enamelled edges, and be 

 reduced to smooth surfaces. At the age of two years 

 or thereabouts, the nippers begin to be changed for the 

 permanent teeth, commencing with the two centre 

 nippers. At three years old, the two centre teeth are 

 broader than the others, but not quite so high, having 

 the black cavity deep, large, long, and narrow. At 

 about three years and a half, the next nippers on each 

 side of the centre teeth will be changed; and at four 

 years and a half or five years old, the corner nippers 

 will have gone also, and have been replaced by the 

 permanent teeth. In the horse, the tusks or hishes 

 begin to appear when about four years old, and are 

 fully grown at six or thereabouts, but in mares they are 

 not visible until the period of old age ; therefore the sex 

 of the horse is known also by the mouth. 



At six years old, the marks in the two centre teeth 



