CVlll INTRODUCTION. 



pad in the upper jaw, on which the incisor teeth of the lower 

 press. His incisors have a certain- power of motion, so that 

 the animal can suit them to sinuosities of the surface when 

 pasturing ; and his upper lip being partially cleft, he has the 

 power of placing his mouth close to the ground, so that he 

 can crop the shortest herbage. He has 8 incisor teeth in the 

 lower jaw, and 6 molars on each side of both jaws, so that 

 the disposition of his teeth may be represented, precisely as 

 in the case of the ox, thus : 



Molar. Canine. Incisor. Canine. Molar. 

 Upper jaw, .6 .0 6 



Under jaw, .6 8 6 



The Sheep has 7 vertebrae of the neck, 13 of the back, 6 of 

 the loins. The sacrum terminates in the caudal vertebrae, 

 which vary in number to 21. The sternum is thin, and has 

 attached to it the projection, partly cartilaginous and partly 

 muscular, termed the brisket. 



The integuments of the sheep are thick and dense, covered 

 partly with hair and partly with wool, kept soft by an oily 

 secretion from the skin. In the wilder races the hair is 

 largely mixed with the wool ; under artificial treatment, the 

 hair diminishes in quantity, and at length is confined to the 

 face and legs, all the rest of the fleece being woolly. The 

 filaments of the wool possess more or less tenuity, softness, 

 and length. 



The following figure is an outline of a ram of the New 

 Leicester breed, divested of his wool. 



Fig. 13. 



