Keywords: The Osteology of the Reptiles-085 jnhbgvyftc.png An illustration from The Osteology of the Reptiles The Osteology of the Reptiles 1925 Samuel Wendell Williston PD-old The osteology of the reptiles Clidastes skull illustrations Platecarpus skull illustrations Tylosaurus fossil illustrations Tylosaurus skulls |