^^ I taped it and watched it yesterday. I liked it quite a bit. Definitely a B-Movie of its time, but very nice. It makes good use of the usual tropes of jungle curses, primitive tribes, family crypts, elderly gentleman scientists and beautiful daughters. It's a bit more graphicly gruesome than other movies of the era, I think, given the beheaded bodies. The cast was very good, too.
As for Jekyll and Hyde, there's a nice DVD set that has both the 30s and 40s version on it. I think I've mentioned it before. After watching the 30s version, the 40s version feels more like My Fair Lady
than a Horror movie.