skillful literary Frenchmen are remarkable, and the translator has well reproduced the art of the author. This, however, is but an incidental though important trait of the volume; its interest centers in the scientific treatment of a vast subject, in the admirable classification of its materials, the incisiveness of the dialectics, and the wealth of information to elucidate and illuminate a great branch of inquiry. De Quatrefages is, moreover, a man of moderate views, a cautious and disciplined investigator, and who, by long familiarity with his subject, speaks with authority, and may be trusted in the representation of his facts.
His work is divided into ten Books, the first of which consists of eleven chapters, in which he discusses in its various aspects the "Unity of the Human Species." The anthropological method is first treated with a general statement of anthropological doctrines. The problem of species and race in the natural sciences is then taken up, and the nature and extent of variations in animal and vegetable races, with their applications to man, are considered. The fusion of characters, and the crossing of races and species in the animal and vegetable kingdoms, are next dealt with, and the conclusions applied to the human race. The human groups obey the laws of crossing, and from his wide survey of the facts the author arrives at the conclusion that all men belong to the same species, and that there is but one species of man.
Book II. takes up the vexed question of the "Origin of the Human Species," which is dealt with in two chapters. There is here a sharp discussion of Darwinism, in which the author refuses to accept the conclusions of the British zoölogist. He admits the principle of natural selection as both a true cause and an important agency in producing the changes of the living world; but he totally denies that this principle is adequate to produce transformations of species or to originate new species. He praises Darwin's accomplishments as a biologist, and acknowledges the indebtedness of science to his investigations, but will not for a moment recognize that he has accounted for the origin of man. On this question he takes the conservative side, and, while cordially commending the vigorous work of advanced naturalists, and recognizing that valuable results may flow from it, he still avows himself as belonging to the old school. Of the origin of life the author says we know nothing, and "all who wish to remain faithful to true science will accept the existence and succession of species as a primordial fact. He will apply to all what Darwin applies to his single prototype." We will refer to this matter again presently.
Book III. takes up the question of the "Antiquity of the Human Species," and gives a succinct account of the relation of man to present and past geological epochs in two chapters.
Book IV. devotes also two chapters to the "Original Localization of the Human Species," and, of course, raises the question of centers of creation and unity or plurality of origins. Agassiz is taken as the ablest representative of the latter doctrine, which is criticised by Professor De Quatrefages with great force. One of the most interesting problems that will have to be worked out one of these days is that of the mental bias and incompetency of judgment acquired by scientific men as a result of their special branches of study. Professor De Quatrefages gives an interesting illustration of this in the case of Agassiz. He says: "There are singular points of resemblance and no less striking contrasts between Agassiz and the most extravagant disciples of Darwin. The illustrious author of the 'Essay on Classification' is as exclusive a morphologist as the latter: neither in his opinion nor in theirs does the idea of filiation form any connection with that of species; he declares, as they do, that the questions of crossing, of constant or limited fertility, have no real interest. We are justified in attributing these opinions, so strange in such an eminent zoölogist as Agassiz, to the nature of his early works. It is well known that he commenced his career with his celebrated researches upon fossil fishes. We have already remarked upon the influence which is almost inevitably exercised by fossils where form alone has to be considered, where nothing calls attention to the genealogical connection of beings, and where we meet with neither parents nor offspring."
