University of Nebraska
Univ. Of Nebraska Museum: Preserving Vertebrate Fossils
This resource details the process by which vertebrate fossils should be excavated and preserved in order to conserve them for as long as possible. It also includes information about the role of amateur fossil collectors and museums.
University of Florida
Fmnh: Vertebrate Paleontology
Has a large group of vertebrate fossil pictures, a guide on preparing fossils, and much more.
University of Florida
U. Florida Museum: Fossil Horse Cyber Museum
An interesting site about prehistoric horses. Has a large gallery of fossilized horse pictures as well as an area explaining how a horse becomes fossilized.