Studies on Fossil Vertebrates Presented to David Meredith Seares WatsonT. Stanley Westoll |
Contents
Prophetic Fossils | 1 |
W E SWINTON PH D F R S | 15 |
The Beginning of the Age of Dinosaurs | 39 |
Copyright | |
10 other sections not shown
Common terms and phrases
adaptations Agnatha Amer amphibians anaspids ancestors animals antiarchs appear armour Arthrodires Australia beds Birkenia bone Brachyopidae Carboniferous cephalaspids Clear Fork collected Cretaceous cyclostomes deposits Devonian Dipnorhynchus Dittonian dorsal Downtonian Dvinosaurus early endoskeletal environment evidence evolution evolutionary extinct fauna figs Figure fin-fold formation forms fossil fresh-water genera genus Geol geological gill sacs habitat Heintz Hist indicate invertebrate jaws Jurassic Kiaer known Lasanius later Lias limestones lower marine Mesozoic mouth mutation-rate Natural Selection neoteny occur origin ostracoderms paedomorphosis paired fins palaeontologists Palaeontology Palaeozoic pectoral fins Permian phyla phytosaurs plates post-cephalic rods posterior premolars present primitive pteraspids redbeds region reptiles rocks Sandstone scales sediments shales Silurian skeleton skull Smith Woodward South species specimens spines stages Stensiö stereospondyls Stetson structure Tertiary tetrapods Texas thecodonts theriodonts tion Traquair Tremataspis Triassic period Upper Devonian ventral ventro-lateral vertebrates Wade Watson Wealden Westoll Wichita