AN event of considerable interest to geneticists, psychologists, and especially to dog fanciers, is to take place at Frankfort on Main on April 22–25, when the Fédération Cynologique Internationale (F.C.I.) is to hold its third congress, which will be followed (April 26–28) by a dog show, open to all the world, and providing classes for all the known breeds. Discussion at the congress will deal mainly with the inheritance of the physical and mental characters of the dog, and papers will be presented by Prof. Henseler, of the Institüt für Tierzucht und Züchtungsbiologie in Munich; Prof. Pirocci, of Milan; Dr. Méry, of Paris; and Major Most, of Berlin. Particulars concerning membership and programmes may be obtained from Fr. Bazille, Roten-waldstr. 83a, Stuttgart-W.