. The origin and evolution of life, on the theory of action, reaction and interaction of energy. period of the early appearance of terrestrial invertebrates and vertebrates. Thisshows the hypothetical South Atlantic continent Gondivana and the Eurasiatic inlandsea Tethys, according to the hypotheses of Suess. Modified after Schuchert, 1916. New Brunswick, of the mountain formations of South Africa,and of the depressions of the centre of the Eurasiatic continentinto the great central Mediterranean Sea, known as the Tethysof the great Austrian geologist, Suess. In the seas of this time,as compar
. The origin and evolution of life, on the theory of action, reaction and interaction of energy. period of the early appearance of terrestrial invertebrates and vertebrates. Thisshows the hypothetical South Atlantic continent Gondivana and the Eurasiatic inlandsea Tethys, according to the hypotheses of Suess. Modified after Schuchert, 1916. New Brunswick, of the mountain formations of South Africa,and of the depressions of the centre of the Eurasiatic continentinto the great central Mediterranean Sea, known as the Tethysof the great Austrian geologist, Suess. In the seas of this time,as compared with Cambrian seas, we observe that the trilo-bites are in a degenerate phase, the brachiopods are relativelyless numerous, the echinoderms are represented by the bottom- 172 THE ORIGIN AND EVOLUTION OF LIFE living starfishes, sharks are abundant, and arthrodiran fishes arestill abundant in Germany. It was long believed that the air-and-water-breathing Am-phibia evolved from the Dipnoi, the air-breathing fishes of theinland fresh waters, and this hypothesis was stoutly main- y -■-■ o*.
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