Poseidonis
Poseidonis is a name used by Blavatsky in the 19th century and later Scott-Elliot(a), to describe the island of Atlantis located in the Atlantic Ocean. The latter incorrectly claimed that the name was given to Atlantis by Plato. It was probably copied from the writings of Crantor who applied it in a similar manner. The name has also been adopted by science-fiction writers such as Clark Ashton Smith (1893-1961).