day dependent upon conditions of climate alone. owever, at all question the conclusion, supported ast accumulation of evidence, that the climate of e in the Eocene period was tropical, whilst that he approximated in temperature to Florida or

ce prevalent, that fossils are not the remains or Is once living, but lusus naturæ formed by some latent in the earth," or, worse still, as Mr. Gosse tly, in our opinion, insinuates, forged documents nkind, Dr. Nicholson pronounces contrary to the of scientific men.

on the "Biological Relations of Fossils," and t on the "Succession of Life upon the Globe," or face to face with the great biological question e origin of species. His views on this subject e interest as he has been to some extent misun. misrepresented. Certain of the remaining advo d school of Natural History have invoked him as cessor to Agassiz and an ally of that redoubted teleology and magniloquence, Principal J. W. we see no ground on which they can claim Dr. elonging to their fraternity. He decidedly recogevolution. "The palæontologist," he writes, "is ronted with the phenomenon of closely-allied forms succeeding one another in point of time, that he o believe that such forms have been developed from

ancestral type by some process of evolution." at there "has also been at work some other deeper v on the nature of which it would be at present late," he says little more than what every cautious dmit. Natural selection, sexual selection, changing ences, disuse of organs, explain much. Do they That Dr. Nicholson can rank among the opponents Darwin-for there are those who deserve the latter e former appellation-no one who reads the final is book can admit. "In the successful solution of vill lie the greatest triumph that palæontology can ; and there is reason to think that, thanks to the afforded by the genius of the author of the 'Origin e are at least on the road to a sure, though it may nt, victory."

ations are numerous, carefully executed, and judied. To each period is appended a list of the prin and memoirs which the student may require to ore detailed information. There is also an elaborate echnical terms employed, an extensive index, and a w of the chief divisions of the animal kingdom," in ver, we regret to perceive that the Mollusca are