This animal, though very small, is still larger than either the ouistiti, or the tamarin. Including the head and body, he is about nine inches long, and his tail is full eighteen He is remarkable for a kind of white smooth hair upon the top and sides of the head, more especially as this colour is wonderfully contrasted with that of the face, which is black, shaded by a small grey down. His eyes are black; his tail is of a bright red from its insertion to near the middle, where it changes to a deep brown, and continues so to the end. The hair on the upper parts of the body is of a yellowish brown colour; that on the breast, belly, hands, and feet, is white. The skin is black, even where covered with white hair. His throat is naked and black like his face. This animal, though of a very singular figure, is nevertheless very handsome. His voice is soft, and resembles more the chaunting of a little bird, than the cry of a quadruped. He is very delicate, and cannot be transported from America to Europe, without the greatest precaution. _Distinctive Characters of this Species._ The pinch has neither pouches on the sides of his cheeks, nor callosities on his posteriors. His tail is flaccid, and as long again as his head and body together. The partition of the nostrils is thick, and the apertures are placed at the side, and not under the nose. The face, throat, and ears are black. The hair on the head is white; the muzzle broad, and the face round. The hair on the body long, and of a reddish colour, until it approaches the tail, and then it becomes of an orange; it is white and shorter on the breast, belly, hands, and feet. The tail is of a bright red at its insertion, darker as it proceeds towards the middle, and entirely black at its extremity. He walks on four feet, and is not above nine inches long. THE MICO.