Here is a list of all the films that I have seen from the 1960's.
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Deep in the rural swamps of Texas the mad Dr. Simond Trent is conducting experiments on the local swamp people in an attempt to discover the secret of evolution. When a party of oil surveyors comes upon his isolated laboratory he decides to take the final step and turn one of them into a grotesque amphibious creature.
A dissatisfied ranch hand becomes a bounty hunter. He conspires with a crooked town boss to dirty up a neighboring village where a valuable railroad franchise is headed, in order to divert it to the town the boss owns. Then, he finds that his former fiancée is married to the sheriff of the town he seeks to destroy.