This animal (_fig. 217._) is smaller than the tamarin, being not above six inches long, including the head; his tail is more than double that length, and annulated with black and white rings, like that of the maucauco, yet at the same time it is more bushy than that animal's. The face of the ouistiti is naked, and of a flesh colour. He has two very singular tufts of long white hair on the fore part of the ears, which entirely conceals them when we look at the animal full in the face. Mr. Parsons has given a good description of this animal in the Philosophical Transactions; and Mr. Edwards has given a very good figure of it: he speaks of having seen several of them, and says that the largest did not weigh above six ounces, and the smallest only four and a half: he very judiciously observes, that the supposition of the small Ethiopian monkey, which Ludolph speaks of by the name of _fonkes_, or _guereza_, being the same animal as the ouistiti, has no foundation. It is very certain that neither the ouistiti, nor any other sagoin, is to be met with in Ethiopia; and it is very probable that the _fonkes_, or _guereza_, of Ludolph, is either the _maucauco_, or the _loris_, which are common in the southern parts of the Old Continent. Edwards farther says, that when the ouistiti (sanglin) is in good health he has a great deal of hair, and very bushy; that one of those which he saw, and which was healthy, fed upon several things, as biscuits, fruits, herbs, insects, and snails; that being one day unchained, he darted at a little gold fish in a glass globe, which he killed, and devoured with the greatest avidity; that afterwards some small eels were presented him, which frightened him at first, by twisting about his neck, but that he soon conquered and ate them. Mr. Edwards adds a fact which proves that these little animals might be multiplied in the southern parts of Europe. He says that they produced young in Portugal, where the climate is favourable to them. At first they have an ugly appearance, having scarcely any hair on their bodies; and they cling close to the teats of their dam. When they grow a little older they fix themselves on her back or shoulders, and when she is weary of carrying she releases herself by rubbing them off against the wall, which being done, the father, if he is by, will allow them to get upon his back. _Distinctive Characters of this Species._