54 SHEEP DISEASES. 



The temporals, divided into the squamous and 

 petrous parts, which fuse at birth, form protective 

 coverings for the auditory canal. 



The maxilla is short and broad. 



The premaxilla is thin and flattened. 



The palatine bone is relatively large. 



The pterygoid bone is comparatively large. 



The nasal bones are short, the size depending 

 on the breed. 



The lacrimal bone is large. 



The malar bone is relatively large. 



The turbinals are very fragile. 



The vomer is wide, its size depending on the 

 breed. 



The mandible or inferior maxilla does not com- 

 pletely fuse during life. 



The hyoid is very short. 



The skull, as a whole, is very powerful and well 

 protects the head. The sheep's chief weapon 

 of defense is butting, and its head has been de- 

 veloped to withstand extraordinary concussion. 



Thoracic or Front Limb. 



The bones of the front limb are small but power- 

 ful, and consist of the following: 



The scapula is nearly triangular in shape. 



The humerus is short, and has a very small 

 deltoid tuberosity. 



The radius is short and relatively broad. 



The ulna extends nearly the whole length of 

 the radius. 



The carpus consists of six bones, four in the 

 upper row and two in the lower. 



