Paleontology

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

The Ivory King

Geology and Inhabitants of the Ancient World

Eurypterids of the Devonian Holland Quarry Shale of Ohio

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 Rise and Progress of Palaeontology

Australasian Fossils: A Students' Manual of Palaeontology

The Coal Measures Amphibia of North America

Fossil Butterflies

Fossils

The Worst of Times

The Chain of Life in Geological Time

Extinct Monsters

Animals of the Past

Some Salient Points in the Science of the Earth