THE last edition of this work was reviewed in NATURE for April 3, 1919. The only important change made in the new edition is the inclusion of twenty-one large plates, most of which are particularly valuable for laboratory work. Plate xii, showing various breeds of British sheep, is crude, and seems unworthy of a place in a book which is otherwise remarkable for its clear diagrams and realistic illustrations.
A Manual of Elementary Zoology.
By. Third edition. Pp. xviii + 616 + xxi plates. (London: Henry Frowde, and Hodder and Stoughton, 1920.) Price 18s.