Evolution

Eurypterids of the Devonian Holland Quarry Shale of Ohio

On the Tendency of Species to Form Varieties

A Civic Biology, Presented in Problems

Essays on Darwinism

The Kingdom of Man

Evolution

The Problem of Increasing Human Energy

Two New Pelycosaurs from the Lower Permian of Oklahoma

The Evolutionist at Large

The Adductor Muscles of the Jaw In Some Primitive Reptiles

History of biology

A Critique of the Theory of Evolution

Evolution of Life and Form

Cranial Osteology of the Hylid Frog, Smilisca baudini

The Conditions of Existence as Affecting the Perpetuation of Living Beings

Mr. Gladstone and Genesis

Biology versus Theology

The Perpetuation of Living Beings, Hereditary Transmission and Variation

Evolution and Adaptation

A Mechanico-Physiological Theory of Organic Evolution