OSTEOLOGY AND ARTHROLOGY 



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the inferior extremity only. This presents itself under 

 the form of a small bone situated in the region ordinarily 

 occupied by the inferior extremity of the outer bone of the 

 leg — that is to say, the external part of the inferior ex- 

 tremity of the tibia ; this little bone articulates with the 



Fig. 52. — Tarsus of the Ox : Posterior Left Limb, Anteko-external 



Surface. 



I, Tibia; 2, coronoid bone of the tarsus; 3, superior articular surface 

 of the astragalus ; 4, inferior articular surface of the astragalus ; 5, 

 calcaneum ; 6, cuboido-scaphoid bone ; 7, great cuneiform bone — the 

 small cuneiform bone is situated at the back of the latter ; 8, principal 

 metatarsal — the small, or rudimentary, metatarsal bone is very small ; 

 it is situated at the back of the preceding, and is not to be seen in the 

 sketch. It would be visible if the view were directly lateral, but then 

 the superior and inferior articular surfaces of the astragalus would be less 

 apparent. 



astragalus and the calcaneum. Some authors consider it 

 to be a tarsal bone, and describe it under the name of the 

 coronoid bone of the tarsus (Fig. 52, 2). It is not, perhaps, 

 quite legitimate to describe it as a bone of this region, for 



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