Louisa thanked her father for his advice, and promised, in future, to pay greater attention to her manners, in which respect she had certainly been hitherto very deficient. Having completed her cap, she enquired whether there would be time for her to have a lesson in natural history: adding, I have, by means of "Bingley's Animal Biography," taught myself a good deal, without your assistance, papa. I have learnt that the animals in the first class, Mammalia, have warm and red blood, that they breathe by means of lungs, that they are viviparous, which means bringing forth their young alive, and that they suckle them with their milk. The jaws are placed one over the other, and are covered with lips. The seven orders into which this class is divided, are, as mamma taught me last week, Primates, Bruta, Ferae, Glires, Pecora, Belluae, and Cete. All this, you see, papa, I have remembered pretty well. Will you now be so kind as to tell me what animals belong to the first order, Primates, and how they may be distinguished? _Mr. B._ The principal animals of this order are, man, the ape, the various tribes of monkeys, and the bat. They have, in each jaw, four front, or cutting teeth; except in some species of bats, which have, occasionally, only two, and at others none. They have one canine tooth on each side, in both jaws. Mr. Bernard then desired Louisa and Ferdinand to open their mouths, and he would show them which were the canine teeth; and, pointing to the sharp, single tooth, situated next to the double ones, he told them that all animals preying upon flesh, were provided with those sharp instruments, for the purpose of tearing their food to pieces. _Louisa_. The more I study nature, my dear papa, the more clearly do I see the goodness and mercy of God, who has so wisely provided for the various wants of his creatures. _Ferdinand_. I am not surprised that men and monkeys should be ranged in the same class, because they are, in many respects, very similar in their appearance; but bats, papa, seem so extremely different. They are a great deal more like birds than man. They have wings, you know, and flit about exactly like birds. _Mr. B._ If you regard their wings alone, they might be classed as you propose, Ferdinand; but if you attend to their formation, with the eye of a naturalist, you will find that they have all the characteristics which determine the class Mammalia. They are viviparous, and they suckle their young. _Ferdinand_. And so do cows, horses, pigs, and many other animals: do they, then, belong to the same class? _Mr. B._ Yes, my dear: cows belong to the class Mammalia, but to the fifth order, Pecora, which is known by their having several blunt, wedge-like front teeth in the lower jaw, and none in the upper. Their feet are defended by cloven hoofs. They live entirely upon vegetable food, and all ruminate, or chew the cud. _Ferdinand_. Pray, what does that mean, papa?