40 
YEKTEiniATA OE THE EAYtJM. 
lialf at ilie Ijac.k. 4'lic proximal surface for the cuneiform {cu.) is concave antero- 
])ostoriorly and convex from side to side. Distally the bone bears two large surfaces 
for tlie fonrtli and fiftli metacarpals, and a much smaller inner surface for the outer 
facet of the slightly displaced third metacarpal. The surface for the fourth 
metacarpal is somewhat concave and looks directly downwards ; that for the fifth is 
convex and looks downwards and outwards, almost joining that for the cuneiform 
externally, making with it the acute angle which is the thin edge of the wedge. 
'I'lie bone is deeper posteriorly than anteriorly. 
The mctacarpah (text-fig. 19, jv 4 0) rvere short and stout and much enlarged at their 
articidations. I'lie first is unknown, but, judging from the size of the distal articulation 
of the sca})hoid, probably little reduction had taken place on this side of the foot. 
Text-fig. 24. 
Left uncifonn of ArnliwWicriiim ziltdl : A, from above; B, from below; C, inner (preaxial) face. 
cu., facet for cuneiform ; mail., facet for magnum ; me. .4, me. 4, me. A, facets for the tliircl, 
fourth, and fiftb metacarpals. 5 nat. size. 
The second is likewise unknown, but it had on its postaxial side a small surface for 
articulation tvith the magnum, as is shotvn by the presence of the corresponding facet 
on that bone. The third articulated mainly xvith the but had a slight 
overlap on the viidform at least anteriorly, d'he fourth and fifth articulated with 
the unciform, and in some cases (c. fj., C. 7968) the fifth seems also to have liad a 
surface of contact with tlie evneifonn (text-fig. 25, cu.). d'he posterior face of the 
upper end of the metacar])als seems in all cases to be ])rodiiccd backwards into a 
strong roughened ])rominence. 
