Paleontology

The cretaceous birds of New Jersey

Thoughts on a Pebble, or, A First Lesson in Geology

Pleistocene Pocket Gophers From San Josecito Cave, Nuevo Leon, Mexico

Fossils: A Story of the Rocks and Their Record of Prehistoric Life Denver Museum of Natural History, Popular Series No. 3

Dinosaurs, with Special Reference to the American Museum Collections

African Dinosaurs Unearthed

Bernissart Dinosaurs and Early Cretaceous Terrestrial Ecosystems

The Desert Bones

Researches on the Visual Organs of the Trilobites

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

Fossil Butterflies

Introduction to the Study of Palæontological Botany

The Rise and Progress of Palaeontology

Geology and Inhabitants of the Ancient World

Eurypterids of the Devonian Holland Quarry Shale of Ohio

The Coal Measures Amphibia of North America

Australasian Fossils: A Students' Manual of Palaeontology

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus