—— Friedrich II. in Englischen Urtheilen. Darwin und Kopernicus, etc. Leipzig, 1884, 8vo.
Ducasse, Félix.—Étude historique et critique sur le Transformisme, etc. Paris, 1876, 8vo.
Dumont, Léon A.—Haeckel et la théorie de l’évolution en Allemagne. Paris, 1873, 8vo.
Duval, Mathias.—Le Darwinisme. Paris, 1886, 8vo.
Dykes, Rev. J. Oswald.—Problems of Faith, a contribution to present controversies, being a third series of Lectures to Young Men, etc. With a preface by the Rev. J. O. D. London, 1875, 8vo.
—— Disputed Questions of Belief; being Lectures to Young Men, etc. London, 1874, 8vo.
Evolution: An Exposition and Critique by the Rev. H. S. Paterson, pp. 183-252.
Elam, Charles.—Winds of Doctrine: being an examination of the modern theories of automatism and evolution. London, 1876, 8vo.
Encyclopædia Americana.—The Encyclopædia Americana, etc. New York, 1885, 4to.
Articles Darwin and Darwinism, vol. ii., pp. 542-555.