EXTREMITIES. 29 



nyras. Epicondjlo-prephalangeus, (G). Extensor pedis, 

 (P). Humero-prephalangens, (L). Attachments : Be- 

 low the crest limiting the groove of torsion of the 

 humerus behind, in front of the inferior tuberosity of 

 that bone, external ligament of the elbow joint, supero- 

 external tuberosity of the radius, external border of 

 the same bone, pyramidal eminence of the os pedis. 

 Action : Extends the third phalanx upon the second, 

 this upon the first, and that upon the metacarpal. 



4. Lateral extensor of the phalanges. — Syno- 

 nyms. Cubito or radio-prephalangeus, (G). Extensor 

 suffraginis, (P). Attachments : External tuberosity of 

 the radius, external lateral ligament of the elbow joint, 

 on the body of botli bones of the fore-arm, capsular 

 ligament of the fetlock joint, and superior extremity of 

 the OS suffraginis. Action : Extensor of the digital 

 region proper. 



Posterior region, five muscles. 



1. External flexor of the metacarpus. — Syno- 

 nyms. Epicondylo-supercarpeus, (G). Flexor metacarpi 

 extern us 5 (P). Humero-supercarpeus externus, (L). 

 Attachments : Summit of epitrochlea, the trapezium 

 and the head of the external small metacarpal. Action : 

 Flexor of the metacapus. 



2. Oblique flexor of the metacarpus. — Synonyms. 

 Epitrochlea supercarpeus, (G). Flexor metacarpi med- 



