Continuity mistake: When the men find the tracks of the dinosaur, the indent is flat and rounded, but when Frosty the poodle finds the dinosaur that made the tracks, its feet are skrawny and have pointy claws, which don't show up in the tracks.
Continuity mistake: The plateau is much bigger in the ground shots than in the arial shots.
Continuity mistake: When the dinosaurs are fighting near the cliff, their position relative to the cliff, and their position relative to each other, changes between shots.
Continuity mistake: When Jennifer is attacked by the vines, she's holding a basket with her poodle in it with one hand and seconds later grabs the vine with both hands without letting go of the basket.
Continuity mistake: When the group finds the dinosaur tracks, Frosty the poodle runs away and finds said dinosaur, but the size of the tracks the men find and the size of the dinosaur don't match.
Continuity mistake: When Roxton finds the diary in the cave, the native girl is sitting down with her left hand on her right leg in long shots and her right hand on her left leg in closeup shots.
