Pure bred gliropshire wether lamb, winner of first prize at the Inter- 

 national Exposition. Chicago. 1900. Bred by H. G. Skinner and owned by the 

 Iowa Agricultural College, Ames, la. 



I'hotogrnplis of slieep teeth, showing changes that occur in the order of 

 appearance of the iueisor.s. The photo on tlie upper left hand shows a 

 lamb's moutli with all temporary incisors. The upper riu'ht hand photo- 

 graph shows mouth of a sheep about one year old, with the first pair of per- 

 manent incisors and the temporary incisors back of them. The photo in the 

 lower right hand corner shows the mouth of a sheep about two years old. 

 with two pairs of permanent incisors appearing. The photograph in the 

 center below shows the mouth of a three year old sheep, with three pairs of 

 permanent incisors. The lower right hand illustration is a photograph of a 

 sheep's mouth when four and a half to five years old. The incisors are all 

 permanent, worn down some and more sloping than the others. 



