24: EQUINE ANATOMY. 



On OS suffraginis, two condyles and antero-posterior 

 groove. On os coron^^ two glenoid cavities separated 

 bv median eminence, and extendend backwards by 

 fibro-cartilage. Two lateral ligaments ; one synovial 

 capsula. Flexion, extension and limited rotation. 



Second inter-phalangeal joint. — Imperfect hinge. 

 On OS coronae, two condyles and antero-posterior 

 groove ; on os pedis, two glenoid cavities with median 

 eminence, extended upon the anterior face of the nav- 

 icular. Five ligaments : one interosseous, two anterior, 

 and two posterior lateral ; one synovial capsula. Flex- 

 ion, extension and limited rotation. 



MYOLOGY, 



Scapular Region. — Division : External and internal. 

 External region, four muscles. 



1. Long abductor of the arm. — Synonyms. Great 

 scapulo-humeral, (G*). Teres major, (P). Great scap- 

 ulo-trochiterius, (L). Attachments : Dorsal angle of 

 the scapula, tuberosity of the acromion, external tuber- 

 osity of the humerus. Action : Abductor and rotator 

 outwards of the arm. 



2. Short abductor of the arm. — Synonyms. Small 

 scapulo-humeral, (G). Teres minor, (P). Attach- 

 ments : Posterior border of the scapula, infra spinous 



* G is abbreviation of Girard; P, of Percivall; L, of Ley h. 



