he marvelous villainess Ursula is one of Disney's classics. She has the gross unsubtlety of Ratigan from "The Great Mouse Detective" but substantially more brio. Although facially somewhat similar to "The Rescuers'" Madame Medusa, Ursula's screen impact dwarfs that of her predecessor. Bejewelled and lip-pouting like an overweight, over-rich, over-pampered, over-the-top society hostess gone mad, she is all flair, flamboyance, and theatricality mixed with a touch of con-artistry. Except when her wrath -- the only genuine emotion she seems capable of expressing -- bursts through, her every movement is a deceitful artifice, as if she's performing for an audience. Her vile hobby of collecting souls so that they can suffer humiliation in her morbid garden is utterly in keeping with her society-hostess-from-hell persona. When anger does bring out her true emotion, the effects are staggering. Her look of stark hatred, even while her face is still human, must certainly have brought nightmares to young children. And when she finally changes into a giant, towering up through the waves and over puny mortals, the embodiment of fury is quite breathtaking. Earlier we may have chuckled at her villainy; at this moment, there is no laughter ... only genuine fear. Film: "The Little Mermaid" (1989) Voice Artist: Pat Carroll