If you look closely, you can see a giant snake skull in a heap of bones. This could be either Titanoboa or Gigantophis. Since the scene where they are found is in the original 1933 film and you have to pause the film to spot it, few have seen it.
Some say Kong may have killed it, perhaps one of the giant snakes that Kong had to kill.
Others say it is the first fossilized snake skull ever seen in film.