From publisher blurb:
Play carnivorous humanoid dinosaurs.
Animal Races: Dawn of the Carnosaur presents a new race of playable humanoids whose members resemble carnivorous dinosaurs. Noble allosaurids, deadly maniraptors, or brutish megaraptors can all be created using customizable racial traits and racial feats, allowing you to play a wide range of dinosaur-themed humanoids called carnosaurians.
Also included: bestiary entries for the monstrous royalty of the carnosaurian race and a brief history of their wicked empire. A dangerous force in the ancient world, this nation was ultimately destroyed by the gods, but even in campaigns set after the carnosaurians' apparent extinction, they may yet return, revived by imperial necromancers for whom death is but a temporary inconvenience.