Very confused as to the damage done by a Beast Shaped' caster in beast form.
http://www.d20pfsrd.com/bestiary/rules-for-monsters/universal-monster-rules #TOC-Natural-Attacks, which is NOT official lists "Large" animals bite as 1d6, a member of my group insists that that is what it needs to be based on.
However, it seems to me that you morph into the creature, you get it's attacks (minus bonuses)
So for example, a natural Dire Tiger has (among other things)
STR 27
Bite 2d6+8/19-20
Special Attacks: pounce, rake
Feat: Improved Critical (bite)
However, beast shape II doesn't list the feat as something that can come along, so you drop it. You also don't get the 27 STR (or it's bonus damage), you get your own +4. You DO get to keep the pounce and rake.
This leaves
STR +4
Bite 2d6
Special Attacks: pounce, rake
Other posts:
http://rpg.stackexchange.com/questions/69985/what-do-you-and-do-you-not-inh erit-from-your-new-form-when-using-wild-shape-be
http://rpgbot.net/pathfinder/characters/polymorph.php
http://paizo.com/pathfinderRPG/prd/coreRulebook/magic.html#polymorph
"In addition to these benefits, you gain any of the natural attacks of the base creature, including proficiency in those attacks. These attacks are based on your base attack bonus, modified by your Strength or Dexterity as appropriate, and use your Strength modifier for determining damage bonuses."