Étienne Félix Berlioux (1828-1910) was a 19th century French professor of geography in Lyon. In an 1883 book he placed Atlantis on the Atlantic coast of Morocco between Agadir (a variant of Gades) and Casablanca. According to Berlioux this location was the site of the city of Cerne the capital of the Atlantes referred to by Diodorus Siculus.
In 1907 he presented a series of papers entitled ‘Morocco and the Atlanteans’ for the Academy of Sciences at Lyons. Berlioux also wrote an account of the slave trade in Africa in the 1870’s. Bergman places Atlantis further north near Rabat.
His book on Atlantis, in French, can be read online(a).