56 SHEEP DISEASES. 



The carpal joints are very free. 



The metacarpo-phalangeal joints are two for 

 each digit. 



The sacro-iliac joint is very strong. 



The hip joint is well protected by a marginal 

 cartilage which reinforces the shallow acetabulum. 



In the stifle joint the synovia! sacs communicate 

 so freely as to form a common joint cavity. 



The tibio-fibular joint is a complete arthrosis. 



The hock joint has very little mobility. 



Adapted as the sheep is for mountain climb- 

 ing, its joints are very strong, and dislocations 

 are rare. 



THE MUSCULAR SYSTEM. 



The panniculus is well developed. 



The masseter is not large but is well developed. 



The hyoid muscles are very strong. 



The diaphragm is appreciably more oblique than 

 in the ox, and relatively wide. 



The muscles of the shoulder girdle, shoulder, 

 arm, forearm, abdomen, pelvis and pelvic limb are 

 similar to those of other animals. 



There are four extensors of the leg and foot. 



Sprains of muscles, even on the roughest of 

 ground, with much jumping, rarely occur in sheep. 



THE DIGESTIVE SYSTEM. 



The lips are thin, and the upper one marked 

 by a distinct cleft. 



The hard palate is smooth, and the mucous mem- 

 brane more or less pigmented. 



The cheeks are lined with large papillae. 



