Fifthly. The sudden appearance of new kinds of animals is another fact which Palaeontologists urge against the doctrine of evolution. According to the view of geologists great changes have, at remote periods, occurred in the state of the earth. Continents have been submerged and the bottom of the sea raised above the surface of the waters. Corresponding changes have occurred in the state of the atmosphere surrounding the globe, and in the temperature of the earth. Accompanying or following these revolutions new classes of plants and animals appear, adapted to the new condition of the earth's surface. Whence do they come? They have, as Dawson expresses it, neither fathers nor mothers. Nothing precedes them from which they could be derived; and nothing of the same kind follows them. They live through their appointed period; and then, in a multitude of cases, finally disappear, and are in their turn followed by new orders or kinds. In other words, the links or connecting forms of this assumed regular succession or derivation are not to be found. This fact is so patent, that Hugh Miller, when arguing against the doctrine of evolution as proposed in the "Vestiges of Creation," says, that the record in the rocks seems to have been written for the very purpose of proving that such evolution is impossible. We have the explicit testimony of Agassiz, as a Palaeontologist, that the facts of geology contradict the theory of the transmutation of species. This testimony has been repeatedly given and in various forms. In the last production of his pen, he says: "As a Palaeontologist I have from the beginning stood aloof from this new theory of transmutation, now so widely admitted by the scientific world. Its doctrines, in fact, contradict what the animal forms buried in the rocky strata of our earth tell us of their own introduction and succession upon the surface of the globe." "Let us look now at the earliest vertebrates, as known and recorded in geological surveys. They should, of course, if there is any truth in the transmutation theory, correspond with the lowest in rank or standing. What then are the earliest known vertebrates? They are Selachians (sharks and their allies) and Ganoids (garpikes and the like), the highest of all living fishes, structurally speaking." He closes the article from which these quotations are taken with the assertion, "that there is no evidence of a direct descent of later from earlier species in the geological succession of animals."[53] It will be observed that Agassiz is quoted, not as to matters of theory, but as to matters of fact. The only answer which evolutionists can make to this argument, is the imperfection of the geological record. When asked, Where are the immediate predecessors of these new species? they answer, They have disappeared, or, have not yet been found. When asked, Where are their immediate successors? the answer again is, They have disappeared.[54] This is an objection which Mr.