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  Top  > Science  > Biology  > Plants and Animals  > Animalia 
Top  > Science  > Biology  > Plants and Animals  > Animalia  > Annelida 
Top  > Science  > Biology  > Plants and Animals  > Animalia  > Echinodermata 
  • Divebums Echinoderms - Offers underwater photographs of various species of sea cucumbers, sea urchins, sea stars, and brittle stars. Includes scientific names.
  • The Echinoderm Portal - Features overview of extant and extinct groups; gallery of images from Scandinavia, Thailand, New Zealand, and Australia; and current research.
  • Echinoderms Up Close - Presents photographs of Lytechinus variegates, Culcita novaeguineae, Ophiomastix annulosa, and Protoreaster lincki. By S. Hottenrott.
  • Echinoderms 1 - Features images of echinoderm fossils. Data include age, place of discovery, and price.
  • Reef Ecology Guide Echinoderms - Offers images of various species of sea stars, feather stars, sea urchins, and sea cucumbers. Site sponsored by Dive Asia Phuket Thailand.
  • Natural Canvas Fossils: Fossil Echinoderms - Presents images of Deltoblastus, Scytalocrinus, Glypticus, Polydiadema, and Gyrocystis.
  • Invertebrates: Echinoderms - Offers taxonomic index, species links and locations.
  • Reeforg Echinoderms - Offers information about sea star, wana, ina, sea cucumber, and pencil slate sea urchins.
  • Kermadec Islands Images of Echinoderms - Features underwater photographs of black seven-armed star, pencil urchin, crown of thorns star, and diadema stars found in this area.
  • Echinoderms in Aquaria - Presents characteristics, traits, and features of crinoids, asteroids, marble stars, linckia stars, and Caribbean cushion star.
  • Ordovician Echinoderms - Offers images of fossils in this era. Includes locations of discovery.
  • Fossilsearch Echinoderms - Offers fossils of this phylum from the Devonian, Silurian, and Ordovician periods. Includes images, conditions, and prices.
Top  > Science  > Math  > Geometry 
  • Wilson's Inversive Geometry - Proving theorems using the Klein viewpoint and some CabriJava illustrations.
  • Xah Lee's Home Page - Includes a visual dictionary of famous plane curves, illustration of common surfaces, information on discontinuous groups of rotation and translation in the plane, and projective geometry.
  • Wallpaper Groups - Provides illustrations and information on different plane symmetry groups.
  • Peek - Program for N-dimensional polytope visualization.
Top  > Science  > Math  > Geometry  > Algebraic Geometry 
  • Algebraic Curves - A discussion on parabola, Cassini's oval, conchoid of Nichomedes, and limacon of Pascal.
  • The Brill-Noether Project - A proposal to answer the basic questions in the theory involving vector bundles on algebraic curves. Open to contributions and linkage to related information.
  • Introduction to Algebraic Geometry - Provides definition of terms through several examples. Includes instructions for running said examples using computer programs.
Top  > Science  > Math  > Geometry  > Computational Geometry 


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