4th. Glires are furnished with two remarkably large and long front teeth, both above and below, and are destitute of canine teeth. Their feet have claws, and are formed both for bounding and running. They feed on vegetables. The genera are, the porcupine, cavy, beaver, bat, marmot, squirrel, dormouse, jerboa, and hare.
5th. The Pecora have several blunt, wedge-like front teeth, in the lower jaw, and none in the upper. Their feet are armed with cloven hoofs. They live on vegetable food, and all ruminate, or chew the cud. The genera are, the camel, musk, deer, giraffe, antelope, goat, sheep, and cow.
6th. Belluae have obtuse front teeth. The feet are armed with hoofs; in some whole or rounded, in others obscurely lobed or sub-divided. They live on vegetable food. The genera are, the horse, hippopotamus, tapir, and hog.
7th. The Cete, or Whales, although they resemble fishes in external appearance, are ranged very properly amongst the Mammalia, having warm blood, similar lungs, teats, &c. Instead of feet, they are provided with pectoral fins, and a horizontally flattened tail, fitted for swimming. They have no hair. The teeth are in some species cartilaginous, and in others bony. Instead of nostrils, they have a tubular opening on the top of the head, through which they occasionally spout water. They live entirely in the sea; feeding on the soft marine animals and vegetables.
The children carefully read over this paper, exclaiming: "It is almost exactly what you have told us before, papa, only here we have it all at one view."
Mr. B. Do you understand the signification of all the words, my dears?
The children looked over it again.
Louisa. Predacious papa; I do not know the meaning of that word.
Ferdinand. Oh, Louisa! I can tell you that. A predacious animal is one that preys upon others.
Louisa. Thank you, Ferdinand. Conical? Does not that mean, in the form of a sugar-loaf?