might infer that the Foraminiferal sarcode, once introduced, might be the substratum or foundation of other but unknown tissues in the higher animals, and that the Protozoon type might continue to subsist side by side with higher forms of living things, as they were successively introduced. He might also infer that the elevation of the animal kingdom would take place with reference to those new properties of sensation and voluntary motion in which the humblest animals diverge from the life of the plant. It is important that these points should be clearly before our minds, because there has been current of late among naturalists a loose way of writing with reference to them, which seems to have imposed on many who are not naturalists. It has been said, for example, that such an organism as Eozoon may include potentially all the structures and functions of the higher animals, and that it is possible that we might be able to infer or calculate all these with as much certainty as we can calculate an eclipse or any other physical phenomenon. Now, there is not only no foundation in fact for these assertions, but it is, from our present standpoint, not conceivable that they can ever be realized. The laws of inorganic matter give no data whence any _à priori_ deductions or calculations could be made as to the structure and vital forces of the plant. The plant gives no data from which we can calculate the functions of the animal. The Protozoon gives no data from which we can calculate the specialties of the Mollusk, the Articulate, or the Vertebrate. Nor, unhappily, do the present conditions of life of themselves give us any sure grounds for predicting the new creations that may be in store for our old planet. Those who think to build a philosophy and even a religion on such data are mere dreamers, and have no scientific basis for their dogmas. They are as blind guides as our primæval Protozoon himself would be in matters whose real solution lies in the harmony of our own higher and immaterial nature with the Being who is the Author of all life--the Father "from whom every family in heaven and earth is named." References:--"Life's Dawn on Earth." London, 1885. Specimens of Eozoon in the Peter Redpath Museum, Montreal, 1888. _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.