134 



Bones of the Lower Extremity 



185. The Rig'ht Os caltis, s. Ccdcaneus, from above. 



The calcaiieum, situated below the astragalus, is elongated posteriorly, 

 funning the Calx, which ends in the tuberosity, Tuberositas calcanei. On the 

 superior surface is the articular facet covered with cartilage, for articulation 



with the body of the astragalus; in front of it is the Stdcns cahanci, which, 

 with the similar Sitlcns tali forms the Sinus tarsi. Internally to the articular 

 facet a process, the Sustentaculum, covered with cartilage on its upper surface, 

 projects; a second similar facet, is sometimes found at the inner anterior angle 

 of the calcaneum. The anterior articular facet serves for articulation with the 

 cuboid bone, articulates therefore with two bones: the astragalus and cuboid. 





Art.w.t:0s 

 entocwneif. 



186. The Rig-lit Scaphoid Bone, Os scaphoideum sen 



e from above. 



The posterior surface of the scaphoid bone serves for articulation 

 with the head of the astragalus; the anterior surface is divided into three 

 facets for articulation with the three cuneiform bones; the internal border 

 presents the tuberosity, Tuberositas ossis navlcularis. The scaphoid bone 

 articulates with four bones: the astragalus and the three cuneiform, sometimes 

 also with the cuboid. 



