Ah, Tarzan--another staple of the comics industry of olden days. There was a time he had more titles going than Batman or Spider-Man...how times change.
Anyway, this tale features the King of the Jungle plus other similar-themed characters, like Korak, Son of Tarzan(nice to see Dad help his son get work) and The Brothers of the Spear.
The main story is an adaptation of the ERB book Tarzan and the Jewels of Opar by Russ Manning, plus:
Tarzan in "The City Under the Sands"(by Dan Spiegle!), "The Guilt of Belazi"
Brothers of the Spear in "Battle in the Boma", and "Tembo! Tembo!"
Korak in "Perilous Passage", and "The Pit"
...over one-hundred and sixty pages of jungle adventure!