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	Trilobites Trilobites The Trilobite Body Tracks Pygidium Cephalon Rolled-up Fossil Mass Grave Primitive Type Complete Trilobite   Previous: Back to Trilobites Book: Prehistoric Life Section: Prehistoric Chapter: Trilobites