CONDYLAETHKA. 451 



rior external face wider than deep at the middle. The external face of the 

 cuneiform is four times as wide as deep. The posterior tuberosity of the 

 scaphoid is acuminate; that of the lunar is shortly truncate, and that of the 

 cuneiform vertically compressed and narrowly rounded. The concave ulnar 

 facet of the last bone covers three-fifths the length. There is but one infe- 

 rior facet of the scaphoid, which is a little wider than deep, and has a me- 

 dian angle directed posteriorly. On the external side posteriorly there is a 

 vertical oval facet for the magnum. The inferior face of the lunar has three 

 facets; one anterior for the magnum; one internal, which widens posteriorly, 

 for the magnum ; and one external, narrow claviform, narrowing posteriorly, 

 for the unciform. The unciform face of the cuneiform is two-thirds its trans- 

 verse, and all of its anteroposterior width. The trapezium is a flat bone, 

 with slight contact with the scaphoid, and extending distal to the trapezoides. 

 It is wide anteroposteriorly and lias a narrow distal facet. The trapezoides 

 have a wider anterior face than the magnum. Its shape is discoid, and its ante- 

 roposterior diameter exceeds the transverse but little. There is no posterior 

 tuberosity. The trapezial facet is accompanied by a notch of the external 

 superior edge. The inferior edge of the anterior face is convex. The mag- 

 num is the smallest bone of the carpus (except perhaps the trapezium). It 

 is compressed, and has the usual elevated median superior tuberosity. The 

 anterior face is subquadrate. There is but one inferior facet, which is con- 

 cave anteroposteriorly. This is bounded on the inner side of the bone by 

 a vertical facet half as wide as the inferior, for the extei'nal proximal edge 

 of the second metacarpal. The facet for the unciform on the external side 

 extends from the entire anterior face upwards and backwards to the supe- 

 rior tuberosity. The posterior tuberosity extends very little posterior to 

 the inferior facet. The external or anterior face of the unciform is a right- 

 angled triangle with the perpendicular side inwards, and equal to the hori- 

 zontal, which is a little convex downwards. The internal side has two 

 facets, one superior oblique for the magnum, the other anterior and trian- 

 gular for the edge of the third metacarpal. The inferior facets are concave 

 anteroposteriorly, and that for the fifth metacarpal is two-thirds the width 

 of that for the fourth. 



