fossa — to the liiimerns between the crest of the tro- 

 chiter and the deltoid imprint. Action : Abductor and 

 rotator outwards of the arm. 



3. SupERSPiNATUs. — Sjuouyms. Super acromio-tro- 

 chiterius, (G). Antea spinatus, (P). Anterior spina- 

 tus, (L). Attachments : Cartilage of prolongraent of 

 the scapula, internal face of the scapular aponeurosis, 

 supraspinous fossa, anterior border and cervical angle 

 of the scapula, summit of the trochiter and trochin. 

 Action : Extensor of the arm, and tensor of the coraco- 

 radialis aponeurosis. 



4. SuBSPiNATUs. — Synonyms. Sub-acromio-trochi- 

 terus, (G). Postea spinatus, (P). Posterior spinatus, 

 (L). Attachments ; Infraspinous fossa, acromion spine 

 and tuberosity, cartilage of prolongment of the scapula, 

 the internal face of scapula aponeurosis, inside the 

 convexit}' of the great trochanter to the crest of the 

 same below. Action : Abductor and rotator outwards 

 of the humerus. 



Internal region, four muscles. 



1. SuBscAPULARis. — Synouyms. Subscapulo-troch- 

 ineus, (G). Attachments : Sub-scapularis fossa, trochin 

 of humerus. Action : Adductor of the arm. 



2. Adductor OF THE ARM. — Synonyms. Subscapulo- 

 humeralis, (G). Teres major, (P). Great scapulo- 

 hunieralis, (L). Attachments : Dorsal angle of the 



