Prof. H. P. Blackmore, curator Blackmore Museum, Salisbury, England; Dr. Thos. Gann, Harrogate, England; Prof. Arthur E. Shipley, Cambridge, England; Dr. Wilfred Grenfell, Labrador; T. W. Lyster, librarian of the National Library of Ireland, Prof. R. F. Scharff, director of the National Museum of Ireland, Dublin, W. Forbes Hourie, all of Ireland; Mr. James Hornell, Dr. W. A. Herdmann, all on information concerning the Ceylon fisheries; Prof. James M. Milne, Belfast, Ireland; David MacGregor, Perth, Scotland; Joseph Baer & Co., Frankfurt, Germany; Herrn C. W. Kesseller, Idar, Germany; Prof. Dr. Carl Sapper, University of Tübingen, Germany; Geheimrath Prof. Dr. Max Bauer, University of Marburg, Germany; Herrn Prof. Dr. Hofer, director Biologische Versuchsstation, Munich; Herrn Ernst Gideon Bek, Pforzheim, Germany; Hon. Albert H. Michelsen, American Consul at Turin; Sabbatino De Angelis, of Naples, Italy; Mons. Alphonse Falco, of the Chambre Syndicale Pierres Précieuses of Paris; Prof. A. Lacroix, Musée Histoire Naturale, Paris; Mons. Georges Pellisier, Paris; Sr. Gaston J. Vives, La Paz, Mexico; Prof. R. Dubois, Faculté des Sciences, University of Lyons, France; Prof. P. Candias, director of the National Museum, Athens, Greece; Prof. G. A. F. Molengraaff, University of Delft, Holland; the late Prof. Dr. Furtwängler of Munich; Dr. Otto Leiner, Custus Landes-Museum at Constanz, Baden; Herrn Dr. A. B. Meyer, Herrn Carl Marfels, Berlin; Prof. Dr. H. Schumacher, University of Bonn; Geheimrath C. F. Hintze, Breslau; Herrn R. Friedlaender & Sohn, Berlin; Herrn Reg.-Rath Dr. W. von Seidlitz, Dresden; Dr. R. Jacobi, director König Zoologichen Museum, Dresden, Germany; his Excellency Dr. Szalaz, director Hungarian National Museum; Dr. S. Radischi, director National Industrial Museum of Budapest; and to Herrn A. B. Bachrach, Budapest, Hungary; Frau Melanie Glazer, of Prague, and Herrn V. Fric, Prague, Bohemia; Herrn Prof. Dr. F. Heger, Custus Imperial Archæological Collection, Vienna; Herrn H. von Willer and Herrn Max Zirner, of Vienna; Herrn Leopold Weininger, the artisan goldsmith of Austria, for many courtesies; Prof. W. Vernadskij, University of Moscow; Mons. C. Faberje, Joaillier de la Cour, St. Petersburg, Russia; his Excellency Baron P. Meyerdorff, assistant director, Musée des Antiques, Ermitage Impériale, St. Petersburg, for important data and illustrations; his Excellency N. J. Moore, Premier, Western Australia; Dr. K. Van Dort, engineer of Bankok, Siam; Dr. J. Henry Burkill, of the India Museum, Calcutta, India; Alphaeus E. Williams, manager of the De Beers Mine, Kimberley; Capt. E. L. Steever, District Governor of Jolo, Philippine Islands; Dr. T. Nishikawa, Zoölogical Institute; K. Mikimoto, both of Tokio, Japan; Dr. S. M. Zwemer of Bahrein, Persian Gulf; Mr. Hugh Millman of Thursday Island, Australia; Julius D. Dreher, American Consul at Tahiti, Society Islands; and not least, by any means, the uniform promptness and