It's going to be very difficult to get an accurate ID with out the Operculum for some of those shells, but you should be able to get a general ID.
Top Four: All of those look like various types of Conchs. In fact, the top right one looks like a Queen Conch. The middle two on the left look like Conchs as well, but the middle two on the right look more like Tulip Snails. The bottom left is a Sand Dollar, the bottom second from the left is a type of Turbo Snail, the second from the left is a Starfish that I'm not sure of, and the bottom right is another type of Conch.