The ouistiti has neither pouches on the sides of his jaws nor callosities on his posteriors. His tail is flaccid, very bushy, with alternate annulated bars of black and white, or rather brown and grey, and is as long again as the head and body. The partition of the nostrils is very thick, and the apertures are placed at the side. The head is round, and cloathed with black hair above the forehead, and above the nose is a white spot without hair. His face is almost all naked, and of a deep flesh colour. He has a tuft of long white hair on each side of the head before the ears. His ears are round, flat, thin, and naked. His eyes are of a chesnut colour. His body is covered with a soft, grey, ash-coloured hair; his throat, breast, and belly, of a light grey, with a slight tincture of yellow. He walks on all fours, and is often not above six inches long. The females are not subject to the periodical emanation. THE MARIKINA. The Marikina (_fig. 218._) is commonly known by the name of the little Lion Ape. We reject this compound denomination, because the marikina is not an ape but a sagoin, and no more resembles the lion than a lark resembles an ostrich, there being no affinity between them, except in the long hairs that surround the face of the marikina, and a tuft of hair at the end of his tail. His hair is long, soft, and glossy. His head is round, face brown, eyes red, ears round, and naked, and concealed under the long hairs which surround his face. These hairs are of a bright red, and those on the body and tail of a very pale yellow, approaching a white. This animal has the same manners, the same vivacity, and the same inclinations as the other sagoins. He seems to be of a more robust temperament, for we have seen one which lived five or six years in Paris, without any other particular care than keeping it during the winter in a chamber, wherein there was a fire every day. _Distinctive Characters of this Species._ The marikina has neither pouches on the sides of his cheeks, nor callosities on his posteriors. His tail is flaccid, and nearly as long again as both his head and body. The apertures of the nostrils are on each side of the nose, and the partition which divides them very thick. His ears are round and naked. The hair is long, of a yellowish red colour about the face[AA], and bright yellow hairs, nearly of an equal length, over every other part of the body; his tail is terminated with a considerable tuft of hair. He walks on all fours, and is not above eight or nine inches long. [Footnote AA: The face is flat, and of a dull purple colour. _Pennant._] THE PINCH.