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	Daphoneus This early fleet-footed dog, rather like a long-tailed greyhound, had strong jaws with killing and meat-eating teeth.   Previous: Back Book: Prehistoric Life Section: Prehistoric Chapter: Grassland Mammals