Atlanticus is the word used by Pedro Sarmiento de Gamboa to describe Atlantis. Thomas Taylor in his celebrated translation of Plato’s works has subtitled Critias as Atlanticus. In the 20th century The Critias Atlanticus was published, being a compilation(a) of seven translations of Plato’s Critias that includes the work of Thomas Taylor, Benjamin Jowett, Henry Davis, R. G. Bury, Lewis Spence, W.R.M. Lamb, John Alexander Stewart.
Walter Rangeley Maitland Lamb (1882-1961) was a noted classical scholar and Secretary of the Royal Academy of Arts (1913-51). He translated some works of Plato which were published by Harvard University Press, London in 1925.
The Atlantis sections of this translation can be read online(a).