of the head and body agree, but the difference of the tail is too great; and it is probable that the tail of that described by Wormius had been broken, for it should have exceeded a foot in length. As in this species the tail diminishes to the size of an awl, and is, at the same time, very brittle; few of the skins therefore have the whole tail preserved as that described by Grew. THE TWELVE BANDED. This seems to be the largest of the species. He has a larger and broader head, and a snout not so sharp as the others; his legs and feet are thicker, and his tail has not any crust; a particularity which is alone sufficient to distinguish this species from all others. He has five toes on each foot, and twelve moveable bands. The buckler on the shoulders is formed of five or six rows, each composed of large quadrangular pieces. The moveable bands are also formed of large pieces, almost square; those which compose the buckler on the rump are like those on the shoulder. The helmet of the head consists of large irregular pieces. Between the joints of the moveable bands and in the other parts of the armour, there appear some hairs like the bristles of a hog; there are also upon his breast, belly, legs, and tail, round scales, almost imperceptible, hard and polished like the crust, and between which are small tufts of hair. The pieces which compose the helmet, the two bucklers, and the cuirass, being proportionally larger and less in number in this than in other armadillos, evidently prove he is the largest of the kind. The head of that from which we took this description was seven inches long, and the body twenty-one. THE EIGHTEEN BANDED.