MANUAL FOR STABLE SERGEANTS. 13 



tect the brain, while those of the spinal column inclose and protect 

 the spinal cord. 



All bones are covered with a tough membrane, the periosteum, 

 except at their articular surfaces, where there is a layer of cartilage. 



FIG. 2. Skull of horse, right view. 1, occipital condyle: 2, paramastoid process; 

 3, mastoid process; 4, posterior process of squamous temporal bone; 5, external 

 acoustic process; 6, zygomatic process of temporal bone; 7, postglenoid process; 

 8, glenoid cavity of squamous temporal bone; 9, condyle of same; 10, supraorbital 

 process of frontal bone; 1{, temporal part of frontal bone; 12, orbital part of frontal 

 bone; 13, fossa sacci lacrimalis; 14, orbital surface of lacrimal bone; 15, lacrimal 

 tubercle; 16, zygomatic process of malar bone; 17, maxillary tuberosity; 18, facial 

 crest; 19, infraorbital foramen; 20, naso-maxillary notch; 21, body of premaxilla; 

 21', nasal process of same; 22, body of mandible; 23, mental foramen; 24, 25, hori- 

 zontal and vertical parts of ramus of mandible; 26, condyle of mandible; 27, coronoid 

 process of mandible; 28, angle of mandible; 29, vascular impression; 80, interalveolar 

 margin; 31, incisor teeth; 32, canine teeth; 33, hyoid bone (great cornu). (From 

 Sisson's Anatomy of the Domestic Animals; copyright, W. B. Saunders.) 



4. The skull (fig. 2) is the bony framework of the head. It con- 

 sists of 34 irregularly-shaped flat bones, and is divided into two 



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