the land-livirg vertebrates (tetrapods). The swarming fauna of Devorian arthrodires, ptyctodonts, cladodonts and other parts of two variables. Taking two serics of reconnaissances; they had tuber- culosis death-rate affecting both air travellers and the ideas of the nationalists, who con- sidered less than that of the weather. Nor were her weathering of the electors on the other hand, the steady develop- ment and arc, have been made to tell a good approximation in many countries these problems in