0. C. Marsh—American Jurassic Dinosaurs. 257 
distal end is comparatively small. The radius is smaller than 
the ulna. The fore limb, as a whole, was very powerful, and 
adapted to varied movements. 
Tae Hinp Limes. 
constricted medially, leaving a wide space between it and the 
fibula. The distal end of the tibia is blended entirely with the 
convex astragalus, so as to strongly resemble the corresponding 
part in Birds. 
The fibula (figure 8) is slender, and has its smaller end above. 
This extremity is applied closely to the head of the tibia by a 
rugose suture, so as readily to unite with it. Its upper articular 
surface is nearly or quite on a level with that of the tibia. 
The distal end of the fibula is expanded, and in the specimen 
figured is firmly codssified with the caleaneum. The two 
coalesce with the tibia and astragalus, and form a smooth con- 
vex articulation for the distal tarsals. The latter are distinct. 
a posterior limbs were more than twice as long as those in 
ront. 
% The bones of the feet of Stegosaurus have not yet been fully 
identified, although a number have been found. In figure 4, 
ate IX, a metapodial bone is shown, and in figure 4, Plate 
VIX, are views of a very characteristic terminal phalanx. 
