Anvil, extra lines thingies As you can see at the bottom of the anvil are a little bit more shape down there, I am sorry I forget what you call them, but if some one could help me and get rid of them, that would be nice.
(Left)

If you have a bottom face which is a large Ngon with a concave edge, Catmull-Clark subdivision will cut the corner,even if the face has holding loops on its perimeter.

(Right)

You need to give the subdivision convex faces to work with, preferably quads. I seem to remember Andrew's Anvil does it like this.