How do you revive a fossil in Pokemon White?

You have to take a fossil to Nacrene City Museum. The lady at the entrance will tell you that if you have any pokemon fossils, she can revive them for you. Give the fossils to her, leave the museum run around a bit, come back and she will give you what ever is in the fossil you got.

Dome Fossil - Kabuto

Helix Fossil - Omanyte

Old Amber - Aerodactyl

Claw Fossil - Anorith

Skull Fossil - Craniados

Shield Fossil - Shieldon

Cover Fossil - Tirtouga

Plume Fossil - Archen