But as Nature acts on one regular plan, connected and extended throughout all her works, and as her progress is always by minute degrees, there must be an intermediate species between the ape and the baboon. This intermediate species actually exists, and is, in fact, to be found in the _magot_, which fills up the chasm between the other two. It differs from the first in having a long muzzle and large canine teeth; and varies from the second, in not having any tail, although there is a small protuberance of skin at that part, which has something of that appearance. This animal, consequently, is neither an ape, nor a baboon, yet, at the same time, partakes of the nature of both. The magot, which is a very common animal in Upper Egypt, as well as in Barbary, was known to the ancients. The Greeks and Latins denominated it _cynocephalus_, because its muzzle resembles that of a dog. These animals, then, must be ranged in the following order: _orang-outang_, or _pongo_, is the first ape; the _pithecos_, the second; the _gibbon_, the third; the _cynocephalus_, or _magot_, the fourth ape, or the first baboon. The _papio_, the first baboon; the _mandrill_, the second; and the _ouanderou_, the third. This order is neither arbitrary nor fictitious, but strictly conformable to the steps of Nature. After the species of apes and baboons, immediately follow the _guenons_, or _monkies_; that is, animals which resemble the two former, but which have tails as long, or longer than their bodies. The word guenon was anciently employed, sometimes to denote a small ape, and at others, the female; it has also been used in the sense we now take it, to denote the apes with long tails, and was probably derived from the word _kébos_, which the Greeks made use of for that very purpose. Of these _guenons_, or _monkies_, we know of nine species, which we shall distinguish by different names, to avoid confusion, and for the sake of regularity. The first of these is the _macaque_; the second, the _patas_, or _red monkey_; the third, the _malbrouck_; the fourth, the _mangabey_; the fifth the _mone_; the sixth, the _callitrix_, or _green monkey_; the seventh, the _moustac_; the eighth, the _talapoin_; and the ninth, the _douc_, so called in Cochin-China, of which country it is a native. The ancients knew only two of this class, the mone and the callitrix, which inhabit Arabia and the northern parts of Africa; they had not the least idea of any other, for they are only to be found in the southern provinces of Africa and the East Indies, countries absolutely unknown in the time of Aristotle. This great philosopher, and the Greeks in general, were so careful to affix proper names to different animals, that they denominated the ape without a tail, _pithecos_, and the monkey with a long tail, _kébos_, both of which they carefully drew from the most apparent character of these animals. All the apes and baboons which they knew, had a