The classic drawing of the sphere displays the known world, or Oecumene (Europe, North Africa, and Asia), with three other continents, labeled the Perioeci, the Antipodes, and the Antioeci. Crates' Perioeci and Antipodes arguably do exist, corresponding roughly to North America and South America respectively, but the continent of the Antioeci, Terra Australis, does not, except in fragments (Australasia and southern Africa). And the earth does in fact have a ring of water around it, but at 60 degrees South latitude, not at the Equator.