• Classification & Cladograms: The Tree of Life coordinated by David Maddison
• Try the TopoZone for FREE (viewable) topo maps on line.
• UC Berkely Paleo Museum. A good background site
• Palaeozoic Forests
• From Helsinki, Mikko K. Haaramo's great attempt to present the complete phylogenetic trees of life.
• NMITA — Neogene Marine Biota of Tropical America. A great site for Neogene otoliths.
• Paleontological Research Institute. A good web start for a great organization.
• A useful Dinosaur database.
• A real good triolobite site by S. M. Gon of the University of Hawaii.
• Ryosuke Motani's Ichthyosaur page.
• Vertebrate Paleontology, University of Nebraska State Museum.
• Fossil Horses in Cyberspace.
• Pennsylvanian fossils of Missouri
• Maryland Geological Survey on Calvert Cliffs or Miocene Shark Teeth of Calvert County, MD
• Jonathan Adams' A quick background to the Pliocene.
• Charles Darwin - The Origin of Species, download the book.
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Extant Sharks and Rays

Michaël Laterveer & Peter H.F. Bor's Egg-capsules of Rays and Skates.

and last, but definitely not least, Fiona's Shark Mania . Certainly a classic site.

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Other Research/Interesting Sites

intute (formerly BIOME's Natural Selection). A search engine-styled gateway to quality, evaluated Internet resources in the natural world co-ordinated by The Natural History Museum, London.

In Search of Giant Squid - An Expedition into the Depths of the Last Frontier.

Life, the Universe, and Everything. From Mississippi State, Darwin's homepage.

U.S. National Geophysical Center is a great visit if you'd like to do some serious bandwidth crunching.

Chesapeake Bay bolide impact in the Late Eocene.

Yale Peabody Museum

The United States Geological Survey

The Geological Society of America

Museum National d'Histoire - Naturelle.

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Useful Websites

• Weather: I prefer Intellicast but the Weather Channel is also useful.
• Maps: The ever helpful MapQuest.
• Tide chart from the University of South Carolina.
• Translation: Altavista's Babelfish continues to be a very useful tool.

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I will consider direct requests to include outside websites, but use the following mental check list when making that decision.
1) Is it non-commercial,
2) Is it on topic:
    a) fossil shark/ray, and/or
    b) relevant collateral shark/ray info, and/or
    c) odontological & other morphological info.
3) Does it provide information not currently available elesewhere (I prefer to keep only one general link).
4) Is it advertising free (this can be somewhat subjective)
5) Does it download relatively fast and avoid useless animation.
6) Is it a site I'd like to revisit.

Links last fully tested March 2010