Of cetacea, or whale-like mammals, sixty-five; ruminantia, or cud-chewers, one hundred and seventy-seven; pachydermata, or thick-skinned mammals, such as the horse, hog, and elephant, forty-one; edentata, like the sloth and ant-eater, thirty-five; rodentia, or gnawers, such as the rat, squirrel, and beaver, six hundred and seventeen; carnivora, or flesh-eaters, four hundred and forty-six; cheiroptera, or bats, three hundred and twenty-eight; quadrumana, or monkeys, two hundred and twenty-one; and marsupialia, or pouched mammals, like the opossum and kangaroo, one hundred and thirty-seven.