o8 

 shaped somewhat like a spear head, smooth and 

 rounded on their external surfaces, but grooved on 

 the side which touches the tongue, pointed at their 

 extremities, and sharp at their edges. The inclination 

 of the young tush is oblique, standing forward, and 

 the situation is comparatively near to the incisors. 

 As the animal's age advances, the tushes retract, 

 the grooves on the inner surfaces wear out, and the 

 space which separates them from the incisors in- 

 creases : all observations, however, concerning the 

 tushes, must be accepted with much allowance, for 

 these teeth are very irregular. As a general rule, 

 the lower tush becomes blunt, or rounded at its 

 point and edges, and also of considerable length, 

 while the upper is often so diminished as to be 

 worn almost to the level of the gum. In stallions, 

 kept only for service, the lower tush, however, 

 frequently attains a great length, presenting the 

 appearance depicted in the coloured engravings 

 of the mouths at twelve and sixteen years. In those 

 plates, the reader will observe the tushes no longer 

 point in a forward direction, but have a decided 

 inclination outward, and somewhat backward also. 

 Another indication of extreme age is also worthy of 



