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now exists almost a library of books which may be classified under the well-known term "Darwinism"; we have a terminology, used in representing the different views and theories, of a really turgid description; there has arisen a study in evolutionary polemics which bids fair in several cases to prove the whole work of some lives; and we might almost say—without intending offence—that dogmas have produced sectaries, and we hear of Lamarckians and Neo-Lamarckians, Neo- and Ultra-Darwinians; the apostles of Weismann and the disciples of Spencer. In fact, the study of Darwinism seems to have resulted in the evolution of a doctrinal literature that makes the reperusal of 'The Origin of Species' a matter of considerable importance, and of great refreshment to the wearied enquirer. In 1889 Mr. Wallace produced a brilliant volume which he entitled 'Darwinism,' and endeavoured to focus the new views which had arisen around the problem of the origin of species during the thirty years which had elapsed since Darwin published his memorable work. In this publication Mr. Wallace reaffirmed the theory, supporting it with new facts, but in a concluding chapter added some novel but incongruous views on the subject of "Darwinism applied to Man."

In 1892 Dr. Romanes published his first volume on 'Darwin, and after Darwin,' an exposition of the Darwinian theory, and a discussion of post-Darwinian questions. His lamented death occurred before the appearance of the second volume in 1895, which dealt with the questions of "Heredity and Utility," whilst the present and concluding section is devoted to the much-argued theses of "Isolation and Physiological Selection," with which the names of the Rev. J.S. Gulick and his own are so justly and indissolubly connected with papers severally communicated to