 The second category Aristotle discusses in the Categories is quantity, and in the chapter devoted to quantity Aristotle actually divides quantity into distinct species. In fact, he gives two divisions; but for the sake of illustrating the general nature of the category, discussing the first division he gives should suffice. According to Aristotle, quantity divides into continuous and discrete quantities; continuous quantity divides into line, surface, body, time, and place; and discrete quantity divides into number and speech (4b20–23). Hence, we have the following genus/species structure: