THE scholarship of years and the spirit of youth, together with grace and charm of exposition, combine to make Prof. C. M. Yonge's book on the life of the sea shore a pleasure to read. This is another volume in the eminently successful New Naturalist series, which is designed to present British natural history in modern scientific perspective for the general reader. It is quite obvious, however, that more than the general reader is catered for, and the biologist, as well as men of science in other fields, will derive profit and enjoyment from this synthesis of knowledge concerning the British intertidal fauna and flora. The Sea Shore By Dr. C. M. Yonge. (New Naturalist Series.) Pp. xvi + 311 + 72 plates. (London and Glasgow: Wm. Collins, Sons and Co., Ltd., 1949.) 21s. net.