Charles Panzetta Chatwin (1887-1971) was a British geologist who used the title The Lost Atlantis for his Presidential Address to the Geological Society on June 9th,1939, defending Lewis Spence and endorsing Wegener’s theory of Continental Drift. He also identified the Atlantic as the home of Atlantis, citing the migratory movements of certain birds and butterflies as evidence for a landmass in that ocean.
It was privately suggested as recently as 2003 that Chatwin had been part of the ‘Piltdown Hoax’.(a)
(a) https://www.bgs.ac.uk/discoveringGeology/geologyOfBritain/archives/piltdownMan/piltdownManTimeLine.html (Link broken Sept. 2020)