This difference is alone sufficient to distinguish the sapajou from the sagoin. We are acquainted with eight sapajous, which probably should be reduced to five species. The first is the _ouarine_, or _gouariba_, of Brasil. This sapajou is as large as a fox, and only differs from that which is called _alouate_ in its colour. The ouarine has black hair, and the alouate red; and as they perfectly resemble each other in every other respect, I consider them as belonging to the same species. The second is the _coaita_, which is black like the ouarine, but not so large: the _exquima_ seems to be a variety of this species. The third is the _sajou_, or _sapajou_, properly so called. This is small, has brown hair, and commonly known by the name of the _capuchin monkey_. There is a variety in this species, which we shall call the _grey sajou_, and which only differs from the _brown sajou_ by this difference of colour. The fourth is the _sai_, called by some travellers the _howler_; he is larger than the _sajou_, and his muzzle is broader: there are two kinds, which differ only by the colour of the hair, the one being of a reddish brown, and the other of a lighter colour. The fifth is the _samiri_, commonly called the _orange monkey_. This last is the smallest and most beautiful of all the sapajous. We are acquainted with six species of sagoins. The first and largest is the _saki_, whose tail is covered with hair so long and so bushy that it has acquired the name of the _fox-tailed monkey_. There appears to be a variety in this species, for I have seen two, both of which appeared to be adult, and yet one was almost twice as big as the other. The second is the _tamarin_, which is generally black, with four yellow feet, but they vary in colour, some being found of an olive brown, spotted. The third is the _ouistiti_, remarkable for large tufts of hair round his face, and an annulated tail. The fourth is the _marikina_ which has a kind of mane on the neck, and a bunch of hair, like the lion, at the end of the tail, whence it has been called the _small lion_. The fifth is the _pinche_, whose face is of a beautiful black colour, with hairs descending from the top and sides of the head, in the form of long smooth tresses. And the sixth is the _mico_, which is the most beautiful animal of this kind; its hair is of a silver colour, and its face as red as vermilion. We shall now give the history of each of these sapajous and sagoins, most of which have been little known. THE OUARINE AND THE ALOUATE.