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. 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!'