But in this department it is to all increasing extent the duty of our German museums to promote a knowledge of and an interest in the animal world of far-off lands by the display of ample collections, so arranged as to convey instruction. There has already been gratifying progress in this respect, but it is clear that for the development of these ideas we need more extensive, up-to-date buildings for our collections and museums. Other countries, especially England, and above all America, are far in advance of us in this matter. Our zoological gardens have the task of putting the _living_ animal world before us. Happily we are doing this by far-sighted methods. To the Zoological Gardens of Berlin belongs the credit of having, to a continually increasing extent, arranged a display of the animal world in appropriate surroundings, and with reference to systematic classification and to its relations with geographical distribution and ethnological science, so far as one can assume the connection or companionship of certain species with man. There we see the disappearing species of wild cattle housed, each according to its peculiar character, in enclosures that are strictly true to nature, and artistically designed. Thus, for instance, the American bison--now hardly to be obtained for its weight in gold is shown in surroundings that remind us of the North American Indians, these also a disappearing race. The ostrich-house takes us back to the land of the Pharaohs, of which the ostrich was once a characteristic inhabitant, as well as the ichneumon, the crocodile, and the hippopotamus. Then the class of rodents is brought before us in almost poetical surroundings, that seem quite to justify the German animal stories of the Middle Ages, and that are calculated to produce quite a different effect on the mind from that of a stiffly arranged exhibition of the regulation type, especially in the case of the rising generation. But on account of the difficulty of securing and maintaining certain species, and their shortness of life in close captivity, our zoological gardens can only properly carry out their programme so long as it is possible for them to continually renew their stock of animals. On the other hand, the museums are all the more responsible for setting before our eyes the various species of animals even long after these have become extinct, and they must do this by means of works of art executed by the hand of man, masterpieces of taxidermy.