Ecology

Dinosaurs, with Special Reference to the American Museum Collections

The British Woodlice

The Kingdom of Man

Darwinism stated by Darwin himself

Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: Eurypterida

Auroræ: Their Characters and Spectra

Australasian Fossils: A Students' Manual of Palaeontology

House Flies

The Conditions of Existence as Affecting the Perpetuation of Living Beings

The Natural History of Chocolate

The Descent of Man

The Coal Measures Amphibia of North America

Citizen Scientist