Continuity mistake: In this scene we see Tarzan holding the prison guard in a neck hold. Before rendering the guard unconscious, the guard manages to throw the keys to the cell which falls near a wall. In the next long shot of the gaol we see the keys have moved closer to the guard.
Continuity mistake: In the scene where a plane drops a canister of mail by parachute, look at the parachute as it comes down. There is a black wire to the right attached to the chute to bring it down faster.
Continuity mistake: In the scene where Tarzan rescues Connie from a lynching, Connie jumps onto the horse ridden by Tarzan with her hands firmly tied behind her back. They then ride into the desert followed by their captors. A close up shot shows Connie is untied and is holding onto Tarzan. In the next few shots Connie's hands are once again tied behind her back.