This book also examines invertebrate fossils including some associated with a shell-crushing marine reptile, the first undoubted recognition of a North American mosasaur???Hainosaurus, the largest mosasaur from the Missouri River Trench???a new species of short-necked plesiosaur, two new mosasaurs, a new species of diving bird, and dinosaurs and other vertebrates from the Late Cretaceous of North