The height of the Giraffe, the singular proportions of its body, the beauty of its coat and the peculiarity of its gait, are sufficient to explain the curiosity which these animals have always excited. Its long and tapering head is lighted up by two large, animated and gentle eyes; its forehead is adorned with two horns, which consist of a porous, bony substance, covered externally with a thick skin and bristly hair. In the middle of the forehead there is a protuberance of the same nature as the horns, but wider and shorter. The head of the Giraffe is supported by a very long neck. Along the neck is a short, thin mane. The body is short, and the line of the backbone is very sloping. Its fore-quarters are higher than the hinder—a feature which is observed in the Hyena. Its legs are most extensively developed, and are terminated by cloven hoofs. The skin, which is of a very light fawn-color, is covered with short hair, marked with large triangular or oblong spots of a darker shade. Giraffes are only found in Africa, and even there they are not numerous. They live in families of from twelve to sixteen members. They frequent the verge of the deserts, and are met with from the northern limits of Cape Colony to Nubia. The usual pace of the Giraffe is an amble, that is to say, they move both their legs on one side at the same time. Their mode of progression is singular and very ungainly. At the same time as they move their body, their long neck is stretched forward, giving them a very awkward appearance. Their long neck enables them to reach with their tongue the leaves on the tops of high shrubs, which constitute a large part of their food. RUMINANTS WITH HOLLOW HORNS. These Ruminants have horns which are covered with an elastic sheath, something like agglutinated hair; they may be divided into two groups. To the first group belong the Chamois, Gazelle, Saiga, Nyl-ghau, Gnu and Bubale. To the second group belong the Common Goat, the Mouflon or Wild Sheep, the Domestic Sheep and the Ox. The most remarkable species belonging to the first division all come under the natural group formerly known by the name of Antelopes. It comprehends about a hundred species, which live, for the most part, in Africa. They are generally slender and lightly-made, fleet in running, of a gentle and timid disposition; they are gregarious, and are particularly distinguishable by the different shapes of their horns. We shall glance at the most remarkable genera resulting from the division of the old general group of Antelopes. THE CHAMOIS. The chief characteristic of the Chamois is constituted by the smooth horns which are placed immediately above the orbits. These horns are almost upright, with a backward tendency, and curved like a hook at the end. The horns exist in both sexes, and are nearly the same size in each. The Chamois has a short tail, and no beard.