In the mountains of Crimea we find, in the main, the same arrangement of plant zones. At some height above sea-level the forest zone begins. White and red beech, oak, and two species of pine appear here in forests. Only on the broad peak surfaces we find poor mountain meadows with thick but short grasses. The name of these mountain pastures (yaila) has been transferred to the entire mountain chain. In the Caucasus we find, within Ukrainian territory, only the forest zone of this mountain system. The forests often attain a height of 2500 m., and consist of various kinds of oak, beech, elms, linden, maple and ash. Above the forest limit we meet with a low shrub formation and the beautiful, wonderfully rich grass and herb growth which cover the mountain meadows of the Caucasus, rising, at a height of 2900–3500 m., to the snow border. The animal-geographical conditions of the Ukraine are much simpler than the plant-geographical. The Ukraine, like the rest of Europe, belongs to the holarctic region, and despite the extent of the land, only slight differences in the fauna are found, these being due to [111]the floral and morphological differences of the mountains, forests and steppes of the Ukraine. Since the ice age, the animal world of the Ukraine has experienced no lesser changes than the plant world. In the ice period many mighty beasts of prey (cave bear, cave lion, cave hyena, etc.) lived here, besides thick-skinned animals (mammoth, rhinoceros), together with the ancestors of the present animal world and various polar forms. All these animals are either altogether extinct, or they followed the receding glacier to the north. On the other hand, together with the post glacial steppe, a steppe-fauna spread out from south and east, which then gradually had to make way for the forest fauna advancing southward with the forests. From this time on, the Ukrainian fauna suffered only very slight natural changes. On the other hand, the artificial changes produced by the hand of man have been all the greater. Many species which were dangerous as beasts of prey or useful for food or skins, have either been entirely exterminated by man or greatly limited in their spread. In destroying the forests and putting cultivated steppes and fields in their place, he has, to a great extent, beaten the way to the heart of Central Europe for the animals of the steppe. But his activity has been rather to exterminate than to change, and he has destroyed the once wonderful animal life of the Ukraine.