contradistinction to the mere study and description of species, and the building up of systems on external characters alone, that he hopes to direct attention. Those comprehensive truths are few. Agassiz tells us, that, after a whole life devoted to the study of Nature, a simple sentence may express all he himself has done: "I have shown that there is a correspondence between the succession of fishes in geological times and the different stages of their growth in the egg,--this is all." Though this is by no means the limit of his claim so modestly expressed, yet that was a grand generalization, and, like the great doctrine of gravitation, and the demonstration by Cuvier of the existence of races of animals and plants on the globe anterior to those now existing, it proves to be of almost indefinite application, and, like those doctrines, has revolutionized science. The peculiar scientific views here presented this is no place to criticize. But we may say that to every student of liberal culture this work is essential. Every teacher's table and every school-library should be furnished with it. _Hannah Thurston: A Story of American Life_. By BAYARD TAYLOR. New York: G.P. Putnam. Mr. Bayard Taylor evidently does not subscribe to the theory which "Friends in Council" attributes to a large class: "that men cannot excel in more things than one; and that, if they can, they had better be quiet about it." Having already achieved a reputation as a traveller, a poet, and a secretary to a foreign legation, he now enters the lists with the novelists, who must look well to their laurels, if they would not have them snatched from their brows by this new-comer.