WHILST in some branches of science, especially physics, there are so many workers in the field that monographs can be continually revised, in others many years must pass by before an expert can bring our knowledge up-to-date. Dr. T. A. Stephenson, one of the two leading workers on anemones at the present time, is to be congratulated on his effort to bring together and set in order the facts known about British sea anemones, their structure, development, bionomics, and classification. It is the first successful attempt to supplement the famous work of Gosse completed so long ago as 1860, when the comparative anatomy of anemones had not Jaeen studied. The British Sea Anemones. By Dr. T. A. Stephenson. Vol. 1. (Ray Society Volume No. 113.) Pp. xiv + 148 + 14 plates. (London: Dulau and Co., Ltd., 1928.)