To this powerful armament was added the great sharp claws of the hind feet, and probably the fore feet, curved like those of eagles, but six or eight inches in length.
During ten years explorations in the Western Cretaceous formations, Mr.Brown has secured for the Museum three skeletons of this magnificent dinosaur, incomplete, but finely preserved.

The first, found in 1900, included the jaws, a large part of backbone and ribs, and some limb bones.

The second included most of skull and jaws, backbone, ribs and pelvis and the hind limbs and feet, but not tail.
The third consisted of a perfect skull and jaws, the backbone, ribs, pelvis and nearly all of the tail, but no limbs.

From these three specimens it has been possible to reconstruct the entire skeleton.

The exact construction of the fore feet is the only doubtful part.