It is my understanding that the alter self spell, due to being a part of the polymorph subschool will also allow you to gain the new forms natural attacks. My DM disagrees with this point of view, but has agree that if I can show him an entry from a designer or a creative team member that alter self does provide natural attacks, then he will allow it.
So my question is can anyone help me find any posting agreeing that the alter self spell provides natural attacks.
Thanks