`` Allosaurus '' was used as the starring dinosaur of the 1956 film `` The Beast of Hollow Mountain '' , and the 1969 film `` The Valley of Gwangi '' , two genre combinations of living dinosaurs with Westerns .
`` Allosaurus '' was used as the starring dinosaur of the 1956 film `` The Beast of Hollow Mountain '' , and the 1969 film `` The Valley of Gwangi '' .