NATURE IN WALES The Quarterly Journal of the West Wales Field Society Editors R. M. LOCKLEY. P. M. MILES. W. S. PEACH. Editorial Address :-Nature in Wales, Orielton, Pembroke. CONTENTS OF VOL. 3. NUMBER 3. AUTUMN, 1957 Page MAMMALS RECORDED IN AN AREA OF WEST WALES. William Condry. 461 THE FLORA OF YNYS SEIRIOL (PUFFIN ISLAND) WITH NOTES ON THE EFFECTS OF MYXOMATOSIS. William G. Lacey. 464 MORE WELSH BIRD NAMES. Thomas Davies 471 FIELD Notes Botanical 477 Insects 481 Birds 484 SCIENTIFIC LITERATURE 486 BOOK REVIEWS 487 SOCIETY'S NOTES 489 LETTERS 492 The Editors and their Scientific Advisers endeavour to main- tain a high standard of accuracy but do not accept responsibility for the statements and opinions of the contributors to this Journal. Issued free to all Members of the West Wales Field Society. On sale, price 2s. 6d.