[Footnote V: This is a precarious name which we have given to this animal, until we know what it is called in its native country. As it is found at Madagascar in the vicinity of _Mangabey_, this name will make it familiar to travellers, who will thus be led to observe it with more precision.] We have seen two individuals of this species, both of which were sent to us by the denomination of _Madagascar apes_. They are easily distinguished from all other monkeys by a very apparent character. The mangabey (_fig. 206._) has its eyelids naked, and of a very striking whiteness. Their muzzle also is large, thick, and long; and they have a ring round their eyes. Those we are speaking of varied also in colour, the hair of one being of a blackish brown on the head, neck, and upper parts of the body, and white on the belly; and in the other it was much lighter over all the body, with a collar of white hair round the neck and cheeks. Both carry their tails turned backwards, the hair of which is long and bushy. They are natives of the same country as the vari, and as they resemble that animal in the length of the muzzle and tail, in the manner of carrying it, and in the varieties of colour; they seem to fill up the chasm betwixt the makis and guenons, or long-tailed monkeys. _Distinctive Characters of this Species._ The mangabey has pouches on each side of his cheeks, and callosities on his posteriors. His tail is as long as the head and body: he has a prominent ring of hair over his eyes, and his upper eyelids are particularly white. His muzzle is thick and long; his eyebrows are rough and bristly: his ears black, and almost naked. The hair of the upper parts of his body is brown, and those below are grey. There are varieties in this species, some being of an uniform colour, and others having a circle of white hair round the neck and the cheeks in the form of a beard. They walk on four feet, and are nearly a foot and a half long, from the point of the muzzle to the origin of the tail. The females are subject to the periodical emanation. THE MONA.[W] [Footnote W: Mona is the name this animal bears in the Spanish and provincial languages. The English word monkey is derived from _monichi_, and both seem to owe their rise to _mona_, or _monima_, the primitive name of these animals.]