18 EQUINE ANATOMY. 



terior face : smooth and round from side to side. 

 External face : has the groove of torsion, external or 

 deltoid tuberosity with crests above and below. In- 

 ternal face : has an internal tuberosity, medullary 

 foramen. Superior extremity : has a head, the great 

 and small trochanters, bicipital groove. Inferior ex- 

 tremity : shows median trochlea ; externally, a trochlea ; 

 internally, a condyle, epitrochlea, epycondyle, coronoid 

 fossa, olecranon fossa, on each side eminences and 

 cavity for ligamentous insertions. 



Development : six nuclei of ossification. 



Fore-arm. 



Kadius. — Body, two faces : Anterior face, convex and 

 smooth. Posterior face has triangular surface, groove 

 for radio-cubital arch, eminence of implantation. 

 Superior extremity : articular surface for humerus, 

 external and internal tuberosities, coronoid process, 

 f acettes for the cubitus. Inferior extremity : articular 

 surfaces for the carpus, external and internal tuberos- 

 ities, four grooves, a rough crest behind. 



Development : three nuclei of ossification. 



CuBTTLTS. — Body with three faces : Anterior face, artic- 

 ulates with the radius. External face, convex. Inter- 

 nal face, concave. Three borders which separate them. 



