Lecturer on Zoology at the South-Western Polytechnic, London. Formerly Fellow of University College, Oxford. Assistant Professor of Natural History in the University of Edinburgh. Naturalist to the Marine Biological Association. Gastropoda. J. V. B. JAMES VERNON BARTLET, M.A., D.D. (St. Andrews). Professor of Church History, Mansfield College, Oxford. Author of _The Apostolic Age_; &c. Frommel. J. Ws. JOHN WEATHERS, F.R.H.S. Lecturer on Horticulture to the Middlesex County Council. Author of _Practical Guide to Garden Plants_; _French Market Gardening_; &c. Fruit and Flower Farming (_in part_). J. W. He. JAMES WYCLIFFE HEADLAM, M.A. Staff Inspector of Secondary Schools under the Board of Education. Formerly Fellow of King's College, Cambridge. Professor of Greek and Ancient History at Queen's College, London. Author of _Bismarck and the Foundation of the German Empire_; &c. Frederick III. of Prussia; Germany: _History (in part)_. K. S. KATHLEEN SCHLESINGER. Author of _The Instruments of the Orchestra_; &c. Editor of the _Portfolio of Musical Archaeology_. Free Reed Vibrator; Geige. L. D. LOUIS DUCHESNE. See the biographical article, DUCHESNE, L. M. O. Gelasius I. L. H.* LOUIS HALPHEN, D.-ES.-L. Principal of the course of the Faculty of Letters in the University of Bordeaux. Author of _Le Comte d'Anjou au XI^e siecle; Recueil des actes angevines_; &c. Fulk Nerra; Geoffrey, Count of Anjou; Geoffrey Plantaganet. L. J. S. LEONARD JAMES SPENCER, M.A. Assistant in Department of Mineralogy, British Museum. Formerly Scholar of Sidney Sussex College, Cambridge, and Harkness Scholar. Editor of the _Mineralogical Magazine_. Galena. L. V. LINDA MARY VILLARI. See the biographical article, VILLARI, PASQUALE. Frederick III. King of Sicily. M. G. MOSES GASTER, PH.D. Chief Rabbi of the Sephardic communities of England. Vice-President, Zionist Congress, 1898, 1899, 1900. Ilchester Lecturer at Oxford on Slavonic and Byzantine Literature, 1886 and 1891. President, Folk-lore Society of England. Vice-President, Anglo-Jewish Association. Author of _History of Rumanian Popular Literature_; _A New Hebrew Fragment of Ben-Sira_; _The Hebrew Version of the Secretum Secretorum of Aristotle_. Ghica. M. N. T. MARCUS NIEBUHR TOD, M.A. Fellow and Tutor of Oriel College, Oxford. University Lecturer in Epigraphy. Joint-author of _Catalogue of the Sparta Museum_. Gerousia. O. Ba. OSWALD BARRON, F.S.A. Editor of The Ancestor, 1902-1905. Hon. Genealogist to Standing Council of the Honourable Society of the Baronetage. Genealogy: _Modern_. O. H. OLAUS MAGNUS FRIEDRICH HENRICI, PH.D., LL.D., F.R.S.