Polymorph (Player’s Handbook v.3.5, p. 263) is based on Alter Self (Player’s Handbook v.3.5, p. 197) that reads, in part:
You acquire the physical qualities of the new form while retaining your own mind. Physical qualities include natural size, mundane movement capabilities (such as burrowing, climbing, walking, swimming, and flight with wings, to a maximum speed of 120 feet for flying or 60 feet for nonflying movement), natural armor bonus, natural weapons (such as claws, bite, and so on), racial skill bonuses, racial bonus feats, and any gross physical qualities (presence or absence of wings, number of extremities, and so forth). A body with extra limbs does not allow you to make more attacks (or more advantageous two-weapon attacks) than normal.
The spell referres to racial skill bonuses, where can I find them and does they replace my class-skills as long as I am polymorphed?