Scientific Classification of the Dog
In this way we determine the exact place of each animal. The dog belongs to the kingdom Animalia, sub-kingdom Metazoa, class Mammalia, order Carnivora, family Canidæ, genus Canis, species Familiaris, variety Hound (possibly) and its individual name, perhaps, is “Rover.”
The important thing is that the reader should have a picture of the actual animal representing each class in his mind’s eye. He should master the distinctions between the great groups, or classes, before proceeding to a more minute classification.