THE APPARITION AND SUCCESSION OF ANIMAL FORMS.

DEDICATED TO THE MEMORY OF THE EMINENT SWISS AND AMERICAN ZOOLOGIST LOUIS AGASSIZ, The Founder of the Modern School of American Biology, and of SIR RICHARD OWEN, A Great and Philosophical Naturalist, to whose Teaching I and very many Others owe our earliest introduction to the Principle of Homology in the Animal Kingdom.

Modern Ideas of Derivation—Development of Animal Forms in Time—Various Theories of Derivation—History of Organic Types—History of Organs—Testimony of the Geological Record—Laws of the Succession Development and Evolution—Evolutionist Theologians

Old Forms of Trilobites, from the Lower Cambrian (p. 173 et seq.) Olenellus Thompsoni, Emmons. Agnostus vir, Matthew. Paradoxides regina, Matthew.