In this volume, Tarzan fends off a scientist"s unnaturally sized jungle animals; protects Cathne, "the city of gold," and its people from Tommy-gun-toting gangsters; outwits treacherous witch doctors and a truck-sized spider; discovers Egyptian ruins; and evades the dinosaurs of the lost land of Pal-ul-don while hunting for their eggs. The familiar faces of Boy, Jane, and Lieutenant Paul D"Arnot — a character fashioned after Jesse Marsh himself — return, and the recurring character Dr. MacWhirtle, a famed and eccentric paleontologist, is introduced for the first time!