and 1955). 162 pages and 24 p l a t e s ; 235 pages and 24 plates. Each 10s. T H E activities of the W r ildfowl Trust have expanded enormously since its inception in 1946. T h e contents of the First Annual Report, reviewed in this journal in 1948, consisted of the business of the Trust and accounts of the wild geese on the Severn, the first catches by means of rocket nets, the decoy and the waterfowl collection, all relatively domestic matters. Gradually the Wildfowl Trust has widened its scope until now it has a world-wide reputation as a centre not only for the study of waterfowl from all angles, through its unique collection of ducks, geese and swans, but also for its extensive research into their population dynamics. W i t h the g r e a t accumulation of material and the limited channels of publication the expedient has been adopted of including in the annual report original scientific papers as well as short notes and interim papers on research in progress. These annual reports have thus assumed more widespread importance than is usual for publications under this heading, and while space does not permit a summary of all the reports since the first, the only one to have been previously reviewed in these pages, the contents of the sixth and seventh reports deserve a fuller mention than is customary in a short review. In the first of these Boyd analyses, in "