Prehistoric Life Prehistoric Secrets in Stone The Earliest Fossils The Silurian Reef Trilobites Fish The Coal Forests Early Reptiles and Amphibians Sea Reptiles Flying Reptiles The Teeming Seas Hunting Dinosaurs Biggest Dinosaurs Two-Footed Plant Eaters Plated and Armoured Dinosaurs Horned Dinosaurs The Mammal Age Dawns Grassland Mammals The Ice Age	Jigsaw Some fossils from the Burgess Shale were thought to be little shrimps, and others to be jellyfish. We now know that they were feeding limbs and part of the mouth of Anomalocaris.   Previous: Back Book: Prehistoric Life Section: Prehistoric Chapter: The Earliest Fossils