In Jess Franco's nightmarish prison movie, sadistic female wardens abuse the     vuluptuous young occupants of their island stronghold. Rather than face an       endless fury of rape and torture the prisoners organize a savage rebellion.      Franco's signature blend of camp, sex, and extreme violence is in full effect  in a film that has faced censorship worldwide. The cast, which includes Maria  Schell, Luciana Paluzzi, Rosalba Neri, Maria Rohm, and Mercedes McCambridge,   is outstanding. In French with English subtitles.                                Jess Franco---West Germany / Italy / Spain---1969---90 mins.