Paleontology

Researches on the Visual Organs of the Trilobites

Dragons of the Air: An Account of Extinct Flying Reptiles

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

Principles of Geology

A New Genus of Pennsylvanian Fish (Crossopterygii, Coelacanthiformes) from Kansas

Essay on the Theory of the Earth

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

Australasian Fossils: A Students' Manual of Palaeontology

The Ivory King

Records of the Fossil Mammal Sinclairella, Family Apatemyidae, From the Chadronian and Orellan

A Pictorial Atlas of Fossil Remains

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

Eurypterids of the Devonian Holland Quarry Shale of Ohio

The Coal Measures Amphibia of North America

The Origin of Vertebrates

The Pleistocene of North America and its vertebrated animals