Introduction to Zovlogy, for the Use of Schools. By Robert
Patterson, F.R.S. (Simms and 31-Intyra, Belfast.)—It is not necessary to ex- patiate on the merits of a work of which 27 thousand copies have been sold since 1816. Hitherto the author has refrained from changes of classification and nomenclature in the text of the successive issues, on account of the inconvenience they would occasion in the class-room. But science advances with rapid steps, and Mr. Patterson has felt him- self compelled to abandon an arrangement which is now obsolete. A new primary group—the "Protozoa "—has been added to the "Invertebrate Animals." The division of the five primary groups into classes has been brought into conformity with the views now entertained of their affinities, and the whole work has been revised and perfected. Yet, as Mr. Patterson warns us, even this edition will in a few years require to be revised anew. However, if boys are to learn science, parents must be prepared to abandon the practice of handing down school-books from brother to brother.
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