5.5e Sheet

Allosaurus

Large Beast (Dinosaur), Unaligned
Summary
AC 13Initiative  +1 (11)
Hit Points 51 (6d10+18)
Speed 60 ft.
CR 2 (450 XP); PB +2
Ability Scores
Details
Actions
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.

Allosaurus