"The colour is greenish-yellow above, arising from the ringing of the hairs with various shades of yellow and black, but assumes more of a dark grizzled appearance on the sides of the body, and outer sides of the limbs, which become gradually darker towards the hands. The face, ears, and naked part of the hands, are of a jet black; the former is of a triangular shape, bounded above the eyes by a straight line of stiff black hairs, and on the sides by spreading tufts of light hairs, with a yellowish tinge, meeting in a point beneath the chin. The neck and chest are white; the under parts of the body have a yellowish tinge; and the inside of the limbs is gray. The length of the head and body is sixteen or eighteen inches, and that of the tail somewhat more."

This animal, or at least one under the title of the "Green Monkey," has been mentioned by many travellers, who give accounts of the vast troops which assemble together. In Adanson's Voyage to Senegal, it is thus introduced :

"But what struck me most, was the shooting of monkeys, which I enjoyed within six leagues this side of Podor, on the lands to the south of Donai, otherwise called Coq; and I do not think there ever was better sport. The vessel being obliged to stay there one morning, I went on shore, to divert myself with my gun. The place was very woody, and full of green monkeys, which I did not perceive but by their breaking the boughs on the tops of the trees, from

whence they tumbled down upon me; for in other respects they were so silent and nimble in their tricks, that it would have been difficult to hear them. Here I stopped, and killed two or three of them, before the others seemed to be much frighted; however, when they found themselves wounded, they began to look for shelter, some by hiding themselves among the large boughs, others by coming down upon the ground; others, in fine, and these were the greatest number, by jumping from one tree to another. Nothing could be more entertaining, when several of them jumped together on the same bough, than to see it bend under them, and the hithermost to drop down to the ground, while the rest got further on, and others were still suspended in the air. As this game was going on, I continued still to shoot at them; and though I killed no less than three-and-twenty in less than an hour, and within the space of twenty fathoms, yet not one of them screeched the whole time, notwithstanding that they united in companies, knit their brows, gnashed their teeth, and seemed as if they intended to attack me."

Another species belonging to this group is Frederic Cuvier's Malbrouk, Cercocebus cynosurus, described and figured by that naturalist as an animal of truly arboreal habits; walking with difficulty on the ground, and exhibiting the greatest activity when sporting on the bars of its cage; it could sustain itself

by successive darts from one side of its cage to the other, performed by the force of its feet alone, and would keep up this severe motion for a considerable period. When young it was docile and mild-tempered, but age brought with it propensities more brutal. The chief characteristic of its disposition, as it is in all the congeners, is extreme caution, or, as it were, an arrangement or previous plan of the actions to be performed; thus, in their attacks, the opportunity is watched when the person or animal is off their guard and otherwise employed, and it is always made from behind; wounds are inflicted with the teeth and nails, and a sudden dart places them at a distance, where they will remain, showing their anger with expressive changes of countenance, and watching the time when the attack can be with safety renewed.

The countenance of this animal becomes more like that of the baboons, and, with the feet and skin of the ears, is black. The cheeks, chin, and a band above the eyes, are white, as also the under parts and the insides of the legs; all the other parts are of a yellowish-green, and the general contour is so similar to the green monkey, that it has been mistaken for it in a young state.

Another allied animal, equally remarkable for the beauty of its yellowish-green fur, is the red-vented monkey, Cercocebus pygerythraeus-a native of the forests to the interior of the Cape, truly arboreal, and never met beyond the boundaries of the larger woody tracts. The form is somewhat different; but the

VOL. I.

similarity of the upper covering, the white cheeks, and frontal band, place it close to those we have just now described.

We again refer to our Synopsis for an enumeration of the other Cercocebi, and will now proceed to the next forms, which will commence

THE BABOONS.

We have now reached these forms which conduct from monkeys of pleasing appearance and gentle manners, to the most disgusting of the whole tribe. They may be generally designated under the title of baboons, but naturally form themselves into two groups-those with the muzzle still more lengthened than the Guenons, but having the nostrils placed as it were on the face; a body of considerable size and strength, and the tail shorter; the dispositions becoming more sulky and untractable, furious and revengeful, when annoyed.* The second, comprised in the true Cynocephali of Cuvier, and which are at once characterised by the position of the nostrils at the very extremity of the muzzle. Their size is very large; their strength enormous; their dispositions possessing scarcely a good quality, and combining great fierceness and malignity, which, joined with their strength, renders them

*The vignette will give an idea of this form.