426 
Dentition as indicative of the Age 
Fig. 37. — Incisors of Sliecp at one year. 
Fig. 38. — Incisors of Sheep at fifteen months. 
recent appearance which this tooth presents is better evidence of 
this age than can be obtained by an inspection of the incisors. 
Occasionally in very forward mouths the second pair of broad 
teeth will be cut ; in other cases there will be no signs of their 
appearance until the sheep is approaching the age of two years ; 
so far, therefore, as these teeth are concerned, the examiner is 
left in doubt as to whether the sheep is one year and six months 
or two years old, and it is absolutely necessary that he should 
inspect the molars, in which important changes occur between 
the ages of fifteen months and two years. 
As the sheep approaches one year and a half, the sixth molar 
begins to protrude through the gum, and shortly afterwards the 
two anterior temporary molars have given place to the per- 
manent teeth, and the third temporary molar is a mere shell 
