Paleontology

The Desert Bones

The zoology of the voyage of H.M.S. Beagle: Fossil mammalia

A Monograph of the Trilobites of North America: with Coloured Models of the Species

Relics of Primeval Life: Beginning of Life in the Dawn of Geological Time

Some Salient Points in the Science of the Earth

The Ivory King

Geology and Inhabitants of the Ancient World

Eurypterids of the Devonian Holland Quarry Shale of Ohio

Introduction to the Study of Palæontological Botany

Researches on the Visual Organs of the Trilobites

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

The Pleistocene of North America and its vertebrated animals

The Worst of Times

The Chain of Life in Geological Time

The Rise and Progress of Palaeontology

Australasian Fossils: A Students' Manual of Palaeontology

The Coal Measures Amphibia of North America

Fossil Butterflies

Extinct Monsters