In "On the Nature of Animals" ("Περὶ Ζῴων Ἰδιότητος", "De natura animalium"), Aelian, quoting Ctesias, adds that India has also a one-horned horse (iii. 41; iv. 52), and says (xvi. 20) that the "monoceros" () was sometimes called "cartazonos" (), which may be a kind of the Arabic "karkadann", meaning "rhinoceros".