Bite. Melee Attack Roll: +6, reach 5 ft. Hit: 15 (2d10 + 4) Piercing damage.
Claws. Melee Attack Roll: +6, reach 5 ft. Hit: 8 (1d8 + 4) Slashing damage. If the target is a Large or smaller creature and the allosaurus moved 30+ feet straight toward it immediately before the hit, the target has the Prone condition, and the allosaurus can make one Bite attack against it.