Scarface is the name of a villainous T-Rex in Land of the Lost.
Scarface lived in the area where the Porters had made their home. He frequently chased many of the main characters, always trying to make a meal out of them. Scarface has been seen fighting such creatures as Spike, a Stegosaurus who lives in the area; and Cyborg, a giant alien from the future, and is more than a match for Scarface in a fight.
Like most dinosaurs seen in Land of the Lost, Scarface was a puppet for close-ups and for wide shots, they'd use stop-motion photography to get Scarface moving.