I may here pause to indicate a few of the more remarkable varieties of the Baboon and the Monkey: premising that by a recent classification the Apes, or Simiæ, are divided into four sections--viz.: Apes, or such as are tailless; Baboons, with elongated muzzles and short tails; Monkeys, generally with long tails; and Sapajous, or Monkeys with prehensile tails. For the present, I limit my remarks to members of the second and third sections. Among the Monkeys of the Old Continent a prominent place should be given to the Proboscis Monkey (_Nasalis larvatus_), who is endowed--I may not say, ornamented--with a nose of the most grotesque character and formidable dimensions. This species measures two feet from the tip of the nose to the tail, which is longer than the body. His colour is a dark chestnut, but the face is marked with blue and red. He belongs to Borneo and Cochin-China, where he assembles in large troops, and feeds wholly on fruit. To Cochin-China also belongs the _Douc_, a very large species, remarkable for their coat of many colours. Back, belly, and sides are of a yellowish-gray; feet black; lower part of the arms and tail, white; a collar of brownish-purple encircles the neck; long yellowish hairs fringe the sides of the face, which is rather flat and of a yellowish bay hue. He measures, when standing upright, three feet and a half to four feet. In South America are found the _Howling Monkeys_. Mr. Bates describes one species, the _Mycetes strumineus_, which measures sixteen inches in length, exclusive of the tail; the whole body is covered with rather long and shining dingy-white hair, the whiskers and beard only being of a tawny hue. "The one of which I am speaking," says Mr. Bates,[173] "was not quite full grown. When it first arrived, it occasionally made a gruff subdued howling noise early in the morning. The deep volume of sound in the voice of the howling monkeys, as is well known, is produced by a drum-shaped expansion of the larynx. It was curious to watch the animal whilst venting its hollow cavernous roar, and observe how small was the muscular exertion employed. When Howlers are seen in the forest, there are generally three or four of them mounted on the topmost branches of a tree. It does not appear that their harrowing roar is emitted from sudden alarm; at least, it was not so in captive individuals. It is probable, however, that the noise serves to intimidate their enemies."