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Ambulocetus   
Large Animal 
Hit Dice: 3d8+21 (34 hp) 
Initiative: +2 (+2 Dex) 
Speed: 15 ft. (3 squares), swim 30 ft. (6 squares) 
Armor Class: 13 (-1 size, +2 Dex, +2 natural), touch 11, flat-footed 11 
Base Attack/Grapple: +2/+14 
Attack: Bite +9 melee (1d8 +8) 
Full Attack: Bite +9 melee (1d8 +8) 
Space/Reach: 10 ft./5 ft. 
Special Attacks: Improved grab 
Special Qualities: Low-light vision 
Saves: Fort +10, Ref +7, Will +4 
Abilities: Str 26, Dex 15, Con 25, Int 2, Wis 16, Cha 9 
Skills: Hide +5, Listen +3, Move Silently +9, Spot +4 
Feats: Lightning Reflexes, Stealthy 
Environment: Warm coast or forest rivers 
Organization: Solitary 
Challenge Rating: 3 
Treasure: None
Alignment: Always neutral 
Advancement: 4-6 HD (Large); 7-9 HD (Huge) 
Level Adjustment: - 

The creatures resting on the bank are quite unusual, looking like furry crocodiles.

The ambulocetus may look like a furred crocodile, but it is in fact a primitve limbed whale. These unusual cetaceans haunt the coastal waters and forest waterways. Mysterious as they are unusual, ambulocetus are rarely seen.

Combat
An ambulocetus will bite an opponent and attempt to drown it.
Improved Grab (Ex): If an ambulocetus bites an opponent, it deals normal damage and attempts to start a grapple as a free action without provoking an attack of opportunity. No initial touch attack is required. Improved grab works only against opponents that are Medium or smaller. The ambulocetus may conduct the grapple normally, or use its bite to hold the opponent. If it chooses to do the latter, it takes a –20 penalty on grapple checks, but is not considered grappled itself; it doesn't lose its Dexterity bonus to AC, still threatens an area, and can use its remaining attacks against other opponents. Each successful grapple check it makes during successive rounds automatically deals bite damage. When the ambulocetus gets a hold after an improved grab attack, it pulls the opponent into its space. This act does not provoke attacks of opportunity. The ambulocetus can even move, along with the opponent, if it can drag its weight.
Hold Breath (Ex): An ambulocetus can hold its breath for a number of rounds equal to 7 x its Constitution modifier.

I already posted the d20 Modern version of this, but I didn't forget the D&D crew when I made it. :D

Velociraptor
Small Animal
Hit Dice: 2d8+8 (17 hp)
Initiative: +7 (+7 Dex)
Speed: 50 ft. (10 squares)
Armor Class: 20 (+1 size, +7 Dex, +2 natural), touch 18, flat-footed 13
Base Attack/Grapple: +1/-1
Attack: 2 claws +4 melee (1d6+2)
Full Attack: 2 claws +4 melee (1d6+2) or bite +4 melee (1d4 +2)
Space/Reach: 5 ft./5 ft.
Special Attacks: Pounce, rake
Special Qualities: Low-light vision
Saves: Fort +7, Ref +10, Will +2
Abilities: Str 14, Dex 24, Con 18, Int 2, Wis 14, Cha 9
Skills: Hide +12, Jump +4, Listen +2, Move Silently +8, Spot +2, Survival +3
Feats: Track
Environment: Warm deserts
Organization: Solitary, or Pack (5-20)
Challenge Rating: 2
Treasure: None
Alignment: Always neutral
Advancement: 3-4 HD (Small); 5-6 HD (Medium)
Level Adjustment: -

Combat
Velociraptors use their sharp claws and teeth in combat. If they can get the chance, they'll leap into the air and rake the opponent.
Pounce (Ex): When a velociraptor makes a charge, it can follow with a full attack, including a rake.
Rake (Ex): A velociraptor gains extra natural attacks when it grapples its foe. It gains two additional claw attacks that it can use only against a grappled foe. Rake attacks are not subject to the usual –4 penalty for attacking with a natural weapon in a grapple. A velociraptor must begin its turn grappling to use its rake. It cannot begin a grapple and rake in the same turn.

Got a question for you guys. Lets say I was working on a new campaign (yes this involves the surprise I mentioned earlier). Would you guys prefer a campaign that allows you to play Dinos, or a prehistoric survival horror campaign thats a tad Lovecraftian.

Survival horror, whos this lovecraft person i keep hearing
about?. im pretty sure i mentioned somewhere i was doing a
dino crisis campaign

Berserkfhurer wrote:

Survival horror, whos this lovecraft person i keep hearing
about?. im pretty sure i mentioned somewhere i was doing a
dino crisis campaign

Lovecraft was a writer in the 20's responsible for creating a new type of horror and for making his own mythology. You can find more on him here:

http://www.hplovecraft.com/

Got more links if your curious.