Z00-GEOGRAPHICAL NOTES. 391 district (where they are kept in herds for the sake of their milk) do not last long. One of my favourite schemes is an attempt to acclimatise buffaloes, which, in my opinion, would be well suited to the country. Unfortunately I have not yet been able to procure any tame buffaloes, and those in this country, even when they are caught young and grow up with the cows, are always rather wild. ‘Two two-year-old cows are here at the present moment. I have introduced rabbits, which are doing well, and promise to thrive. <A large duck thrives, and multiplies in a remarkable manner; it is similar to the so-called Turkish duck; I bought the original birds from the Zanzibar Arabs settled in Uganda, and they have spread over the whole of our province, just like the Papaw-tree. Pigeons do not thrive everywhere, chiefly owing to the numerous birds of prey, which decimate them.

2. ZOO-GEOGRAPHICAL NOTES.

GEOGRAPHICAL PROBLEMS OF THE AFRICAN TROPICAL FAUNA—LIMITS OF WALLACE'S ZOO-GEOGRAPHICAL REGIONS—MIGRATION OF ANIMALS AND ITS CAUSES—AFRICAN AND EUROPEAN BIRDS OF PASSAGE— DIVERSITY OF THEIR MIGRATIONS—SOUTHERN LIMIT OF EUROPEAN VISITORS— MIGRATING FISHES—GREAT LINE OF SEPARATION FROM SOUTH-HAST TO NORTH-WEST—THE REGION OF STEPPES AND FORESTS OF THE BAHR-EL-JEBEL — ANIMALS CHARACTERISTIC OF THE STEPPES AND FORESTS—THE GEOGRAPHICAL DISTRIBUTION OF THE GREY PARROT— THE CHIMPANZEE—SCARCITY OF BIRDS OF PREY.

Land, December 1884. THE study of the tropical fauna of Africa has in many respects peculiar claims on our attention; for, in the first place, forms most closely connected with those characteristic of it at the present time, appear in the miocene deposits of Europe, so that this fauna occupies a most exceptional position as regards its antiquity, geological antiquity I might say, compared with the existing types of later date. And, indeed, the camelopard, hippopotamus, Orycteropus (Cape ant-eater), and others belonging to a period of creation long passed away, intrude as anomalies into our times. But it is not antiquity alone