ANATOMY. 57 



The tongue has a smooth tip. 



The milk teeth number twenty. 



There are thirty-two permanent teeth: eight 

 incisors in the lower jaw; none in the upper; six 

 molars in each arcade, or twelve in the lower and 

 twelve in the upper jaw. The cement is usually 

 black. The following table gives the eruption 

 periods of the various teeth: 



When the lamb is about a year old, the central 

 pair of milk teeth drop out, succeeded by a pair 

 of permanent teeth. 



About two years of age, the second pair of milk 

 teeth (on each side of the centrals) drop out, 

 and permanent teeth take their place. 



A year later, the third pair of milk teeth are 

 "shed" and the permanent teeth have appeared 

 in their place. 



At about four years of age, all the milk teeth 

 have vanished and the sheep has a i i full mouth. ' ' 



Forced feeding and fattening cause the teeth to 

 shed earlier; some show sheep having lost sev- 

 eral of their permanent teeth before the age of 

 five years. However, as a rule, the seven-year-old 

 has lost one or two, and has a "broken mouth"; 

 but one cannot tell the age of sheep with cer- 

 tainty, by the teeth. 



