The Snake Woman (1961)

Starring Susan Travers, John McCarthy, Geoffrey Denton, Elsie Wagstaff, Arnold Marle
Directed by Sidney J. Furie
(actor & director credits courtesy IMDB.com)

A scientist injects his wife with snake venom to cure her insanity, but when their daughter is born, she shows signs of being part-reptile, and is thought a creature of evil by the townspeople.

I'd have to label this film as disappointing, although there's some fine shadowy photography, good performances, and professional production values.  Despite all this, there's a lack of imagination in creating a compelling character for Travers as "the snake woman," and no payoff with a creature makeup or any special effects.  Intercutting Travers with footage of a regular-sized snake suggests her ability to transform into the creature, but the filmmakers could have done so much more to make this a memorable horror film.  Still, I can't quite dismiss the movie, as it's certainly well-crafted, and entertaining to watch.