. The doctrine of descent and Darwinism. Evolution. 72 THE DOCTRINE OF DESCENT. the tail and renders it strikingly unsymmetrical. The Ganoids are, as comparative anatomy has proved with. certainty, a development of the shark-like fishes, if not decidedly of a higher grade. The Ganoids, therefore, presuppose the shark. The carboniferous period owes its name to the enor- mous accumulation occurring in its midst, of the re- mains of terrestrial plants, fern-like Calamites, and more especially of Sigillaria and Lepidodendra, stand- ing between vascular Cryptogams and Conifers. They formed tropical
. The doctrine of descent and Darwinism. Evolution. 72 THE DOCTRINE OF DESCENT. the tail and renders it strikingly unsymmetrical. The Ganoids are, as comparative anatomy has proved with. certainty, a development of the shark-like fishes, if not decidedly of a higher grade. The Ganoids, therefore, presuppose the shark. The carboniferous period owes its name to the enor- mous accumulation occurring in its midst, of the re- mains of terrestrial plants, fern-like Calamites, and more especially of Sigillaria and Lepidodendra, stand- ing between vascular Cryptogams and Conifers. They formed tropical bog-forests, such as Franz Unger some years ago attempted to restore in an ingenious compo- sition. In these steaming primaeval forests, diflfering from the early beginnings of antecedent periods by their extent and luxuriance, new phases of animal life become manifest—scorpions, myriapods, and in- sects—in other words, air-breathing Articulata, and likewise the first air-breathing Vertebrata. The latter, the Cheirotheria, or Labyrinthodonta (colossal Batra- chians) possess pre-eminently amphibian characters, and exhibit, for example, several important characteristics of the Batrachian skull, whereas their skin-covering recalls. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schmidt, Dr. (Eduard Oskar), 1823-1886. New York, Appleton
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