356 SR) CAPPS IR. 
upper side, by a flat face for articulation with the two smaller tarsals. 
The inner border is thicker and less strongly concave than the shorter 
outer border. Distally, the bone is not one-half the width of the 
proximal end. It is somewhat thickened, and terminates in a convex 
articular face. 
Phalanges.—The first finger has at least six, possibly seven, phalan- 
ges, all stout and of a slender hourglass shape. The inner margin 
has the greater concavity. 
The second finger has seven phalanges, shaped much like those of 
the first finger, with the greater concavity on the posterior margin. 
The third finger is of about equal length with the second, and 
probably had the same number of phalanges, but the bones are 
somewhat more slender. The posterior margin is more concave and 
shorter than the anterior. 
The fourth finger has about six phalanges which were somewhat 
thinner and flatter than in the first three fingers. The greater mar- 
ginal concavity is on the posterior side. 
The fifth finger is thin and flat. There were five or six phalanges, 
all much wider than thick, with the greater concavity on the anterior 
side. This finger is considerably shorter than any of the others. 
The bones of the hind limbs were somewhat intermingled, and 
partially disarranged, but a careful study of their positions as found 
in the chalk slab renders any other arrangement than the one given 
for all save the terminal bones practically impossible. 
