Spider Baby or, The Maddest Story Ever Told (1968) 81 min - written & directed by Jack Hill, starring Lon Chaney Jr., Carol Ohmart, Quinn K. Redeker, Sid Haig, Jill Banner, and Beverly Washburn

Lurking in a dilapidated mansion and suffering a regressive mental deterioration live the last generation of the inbred Merrye family. While the old family retainer struggles to care for the degenerate siblings greedy distant relatives descend with lawyers to dispossess them.

While particular praise goes to the two young female leads, the whole tongue-in-cheeck production is perfectly pitched.

Hill was one of the two writers of “The Terror” for Corman…also one of the five or more directors which included Coppola and star Nicholson.