As to the actual pose in feeding, there can be little doubt as to its general similarity to that of the _Raptores_ among the birds, as suggested to me by Dr.Wortman (see fig.

10); one of the hind feet rested on the prey, the other upon the ground, the body being further balanced or supported by the vertebrae of the tail.

The animal was thus in a position to apply its teeth and exert all the power of its very powerful arched back in tearing off its food.

That the gristle of the bone or cartilage was very palatable is attested not only by the toothmarks upon these bones, but by many similar markings found in the Bone-Cabin Quarry.
_The Bird-Catching Dinosaur._ Of all the bird-like dinosaurs which have been discovered, none possesses greater similitude to the birds than the gem of the quarry, the little animal about seven feet in length which we have named _Ornitholestes_, or the "bird-catching dinosaur." It was a marvel of speed, agility, and delicacy of construction.

Externally its bones are simple and solid-looking, but as a matter of fact they are mere shells, the walls being hardly thicker than paper, the entire interior of the bone having been removed by the action of the same marvelous law of adaptation which sculptured the vertebrae of its huge contemporaries.