Bones of the Lower Extremity. 143 



For the os cuneiforme II 

 For the os cuneiforme III 



For the os cuneiforme I 



Tuberositas ossis navicularis 



191. Right scaphoid bone, os naviculare pedis, from in front. 



The os naviculare pedis (scaphoid bone) (see also Figs. 198 203 and 271) 

 is oval, flattened from before backward and lies in front of the talus on the medial side 

 of the tarsus. It possesses proximally a markedly concave articular surface covered with 

 cartilage for the caput tali, distalward a convex surface covered with cartilage and 

 divided by two ridges into three parts for the three cuneiform bones. The lateral surface 

 supports, usually, a small articular surface for the os cuboideum (see Fig. 271). The 

 upper surface is rough, convex and slopes markedly toward the medial side. Medianward 

 on the lower surface the broad rough tuberositas ossis navicularis projects downward. 



