The specimen catalogue of the Collection of Fossil Vertebrates in the Department of Geology and Geophysics at the University of Wyoming in Laramie is now available on the World Wide Web. The URL for the site is http://paleo.gg.uwyo.edu. The construction of the website is the final step in the collection improvement grant (DBI-9808626) awarded by the National Science Foundation to Jay Lillegraven and Mike Cassiliano. The website was built by Brian Kraatz, a graduate student of Jay's. The specimen catalogue lists over 41,000 vertebrate fossils, an increase of more than 14,000 since the start of the grant. The collection's main focus is on mammals from the late Cretaceous, Paleocene, and early Eocene.