108 



THE SKELETON OF THE HORSE 



surfaces and four borders. The superior surface is concave from before backward, 

 and almost all of it articulates with the tibial tarsal; a non-articular depression 

 cuts into its outer part, and sometimes there is a facet for the fibular tarsal bone on 

 the posterior angle. The inferior surface is convex, and is crossed by a non-articu- 

 lar groove, which separates facets for articulation with the third and the first and 



Fourth tarsal 



Groove for great vieta- 

 larsal artery 



Fourth {external) tneta- ' ' 

 tarsal \ 



Tuber ealcis 

 Fibular tarsal 



j^ TrocJilea of tibial tarsal 



Depression for external 

 lateral ligament 



Central tarsal 

 Third tarsal 



Vascular canal 

 Third (large) mctatursal 



Eminence for lateral ligament 



Fig. 84. — Right Tarsal and Metatarsal Bones of Horse, External View. (After Schmaltz, Atlas d. 



A a at. (1. Pferdes.) 



second (fused) tarsals. The anterior or dorsal border and the internal border 

 are continuous, convex, and rough. The posterior or plantar border bears two prom- 

 inences, separated by a notch. The external border is obli(|ue, and liears anterior 

 and posterior facets for articulation with the fourth tarsal, between which it is ex- 

 cavated and rough. 



