Our very first discovery in the Bone-Cabin Quarry gave us the hint that _Diplodocus_ was distinguished by relatively long, slender limbs, and that it may be popularly known as the "long-limbed dinosaur." The great skeleton found in the Como Bluffs enabled me to restore for the first time the posterior half of one of these animals estimated as sixty feet in length, the hips and tail especially being in a perfect state of preservation.

A larger animal, nearer seventy feet in length, including the anterior half of the body, and still more complete, was discovered about ten miles north of the quarry, and is now in the Carnegie Museum in Pittsburg.

Combined, these two animals have furnished a complete knowledge of the great bony frame.
The head is only two feet long, and is, therefore, small out of all proportion to the great body.

The neck measures twenty-one feet four inches, and is by far the longest and largest neck known in any animal living or extinct.

The back is relatively very short, measuring ten feet eight inches.