Theoretical continents

thumb|upright=1.6|Athanasius Kircher's map of Atlantis, placing it in the middle of the Atlantic Ocean, from Mundus Subterraneus 1669, published in Amsterdam. The map is oriented with south at the top.

Latin term used for hypothetical continent since ancient times

hypothetical lost continent, existence proposed by Augustus Le Plongeon

thumb|upright=1.4|An 1876 map illustrating the supposed location of Lemuria and the hypothetical dispersal routes of the "12 Race (human categorization)|varieties of men" from their alleged Lemurian origin across the globeLemuria (), or Limuria, was a continent proposed in 1864 by zoologist Philip Sclater, theorized to have sunk beneath the Indian Ocean, later appropriated by occultists in supposed accounts of human origins. The theory was discredited with the discovery of plate tectonics and continental drift in the 20th century.