IT is announced that the Twelfth International Congress of Zoology will be held at Lisbon on September 15-21 under the presidency of Prof. A. Ricardo Jorge, professor in the Faculty of Sciences in the University of Lisbon, and director of the Zoological and Anthropological Department of the National Museum of Natural History (Museum Bocage). His Excellency the President of the Portuguese Republic has consented to become Patron of the Congress, and the Portuguese Government has invited foreign countries to be represented by official delegates. It has been provisionally arranged that the work of the Congress will be carried on in twelve sections, dealing respectively with (1) general zoology (including cytology and genetics), (2) embryology and the mechanics of development, (3) comparative anatomy, (4) physiology, (5) zoogeography and palseozoology (including ecology), (6) protozoology, (7) entomology, (8) invertebrates, (9) vertebrates, (10) parasitology, (11) applied zoology, (12) nomenclature. Some of these sections may be subdivided if the need arises. Among social events proposed are receptions by the President of the Republic, by other Ministers, by the Rector of the University, and by the municipality of Lisbon; and various excursions, including one to Madeira and the Azores to take place after the Congress, are contemplated. Special facilities as regards railway fares and hotel rates are being arranged for by the organising committee. Zoologists desiring to take part in the Congress are requested to communicate with the president, Prof. Arthur Ricardo Jorge, Director, Zoological and Anthropological Department, National Museum of Natural History, Lisbon, Portugal, from whom particulars can be obtained.