Airboy lands his plane in Tarzan territory (see the link below the story). He and his boss, Tex, are captured by Romans, who have built a civilization in the African jungle. The unknown author of this story was probably inspired by the Edgar Rice Burroughs novel, Tarzan and the Lost Empire, which was published in 1929.
Drawn by Ernest Schroeder, from AirboyComics Vol. 6 No. 11 (1949). Cover by Dan Zolnerowich.
Here is a story of Tarzan taking a cruise with some ancient Romans. Just click on the thumbnail.