The materials brought by the expedition are numerous in all their branches, but their study will not be completed before two or three years. It will not be until then that we can ascertain the importance of the results obtained. Thanks to the Belgian Government, a great publication is expected, and a commission has been chosen to organise and direct it. We can, nevertheless, and immediately, enumerate some of the results. This is what I propose to do in a few words with this reservation: that these indications are, for the most part, provisional and far from representing a complete table of the scientific advantages which will be derived from the expedition. GEOGRAPHY AND GEOLOGY THE geographical discoveries were made in the south and west of Bransfield Strait in Dirk-Gerritz Archipelago. In this region earlier explorers noticed a large land (Palmerland), separated by a gulf (Hughes Gulf) from another land situated in the east (Trinityland). Larsen, the captain of the _Jason_ (1892), having seen south of Louis Philippeland a vast communication between the Atlantic and the Pacific, Trinityland became an island for geographers. Dallmann, the captain of the _Grönland_ (1872), had discovered on the Pacific side an entrance to a strait (Bismarck Strait). Geographers then made an effort, upon the maps, to communicate Hughes Gulf with Bismarck Strait. The observations of the Belgian Antarctic Expedition demonstrate that this is all incorrect. Palmerland is a vast archipelago of small islands; Hughes Gulf is the entrance to a large strait which brings Bransfield Strait into communication with the Pacific Ocean. This strait extends from latitude 63° 51′ to 65° south, and its direction is north-east to south-west. The Pacific mouth of Belgica Strait does not coincide with the entrance to Bismarck Strait, which, from the position assigned by Dallmann, is situated much farther south; but it is possible that Dallmann made a mistake in his observation, and that this is the very same strait. Trinityland is but the cape-land of a large tract (Dancoland) which forms the eastern shore of Belgica Strait, and which is only the continuation of Grahamland.