50 DESCRIPTION OF THE SKELETON. 



second Second Range. — The second range of the tarsus consists of the three 



Range. 



cuneiform bones and the cuboides. 

 internal The internal cuneiform hone (Plates XIII. and XIY. I) supports the 



Cuneiform 



Bone, great toe exclusively, and has, in reality, a wedge-like form. Its ante- 

 rior surface is rough, and the bone narrows posteriorly. Superiorly it is 

 connected with the naviculare, inferiorly with the metatarsal bone of the 

 great toe, externally with the middle edge of the inner cuneiforme. This 

 bone is three inches square on its upper surface. 

 Middle The middle cuneiform bone (Plates XIII. and XIY. H) is the smallest 



Cuneiform 



Bone. of the three cuneiform bones. It is rough above, prominent below; con- 

 nected by the postero-superior articulating surface with the naviculare ; by 

 the antero-inferior with the naviculare above, and the second metatarsal 

 below ; internally with the internal, and externally with the external 

 cuneiforme. Its anterior face measures two inches transversely, and one 

 from above downwards. 



External The external cuneiform bone (Plates XIII. and XIV. G) is flat, rough 



Cuneiform 



Bone, on the superior edge, tuberculated inferiorly. Superiorly and posteriorly, 

 this bone is articulated with the naviculare ; inferiorly and anteriorly with 

 the metatarsal bones of the middle and fourth toes (that of the elephant 

 corresponds with the middle only) ; internally with the middle cuneiforme, 

 and externally with the os cuboides. This bone measures three inches 

 transversely by half an inch vertically. 

 cuboides. The cuboides (Plates XIII. and XIY. F) is a flattened rather than a 



cuboid bone. Its superior or anterior edge is rough, forming a part of the 

 upper surface of the foot. Its infero-posterior part is compressed in a sharp 

 edge. Its superior surface is smooth for extensive connection with the os 

 calcis and naviculare. Its inferior face presents two articulating surfaces, 



