The general form of the under jaw of this animal is made up of three distinct angles; one horizontal, on which the jaw rests (when placed on a table), from the front to the back, where a small corner appears cut off, whence it rises perpendicularly to the condyle. The same view of the elephant’s jaw exhibits very nearly a regular portion of a circle without any angles. The arms of this animal’s jaw (composed of the condyloid and coronoid processes and their bases), are short as well as flat, adapted to the peculiar form of the upper jaw, which I shall proceed to describe; whereas those of the elephant are comparatively thick, and generally as long as, and frequently longer than, the body of the jaw itself: This length is adapted to the great elevation of the cavity for the condyloid process, taking the level of the teeth as a base from which to measure. The angle from the teeth to the condyles of the neck in the elephant is at least forty-five degrees, and sometimes more; but in the Mammoth the same angle does not exceed ten or fifteen degrees; hence the comparative disproportion of their jaws with respect to length and height. In the back of the elephant’s head there is a very deep cavity for the reception of muscles from the spines of the back to support the head; which cavity commences immediately from the condyle of the neck: The back of this animal’s head presents a very different outline, for there is scarcely any appearance of a cavity; and the whole of the back part of the head is angular, in contradistinction to that of the elephant, which is composed of two lobes receding forwards from the condyle of the neck. I have been here particular, as in this respect the two animals are vastly different, and it may lead to curious speculations concerning the structure of the unknown parts and the habits of the animal. The hips were somewhat broken, but the parts uninjured were sufficient to shew a very different form from those of the elephant, which are high in comparison with their breadth; and consequently the rump of this animal was even more depressed than the elephant’s, in the manner of the American bison or buffaloe. In the elephant the angles from the _ossæ tabulæ_ to the lateral processes of the ilium, are very great; whereas in the Mammoth they are almost on a straight line. From all the drawings of elephants, and from such of their real ribs as I have seen, I have observed one universal character; towards their junction with the cartilage they are broad and more or less bent sidewise in an undulating form; whereas those of the Mammoth are very small in the same place, and in form without any lateral bend.