. The doctrine of descent and Darwinism. Evolution. 70 THE DOCTRINE OF DESCENT. The Molluscs were mainly represented by Brachiopoda and Cephalopoda. However, as Bivalves and Gaster-. opoda were also in existence, the appearance of this, the most ancient molluscous fauna known, differs from the present one only in its numerical proportions, and in the circumstance, certainly very important, that of the Cephalopoda the Nautilus alone is found. The Brachio- poda soon attain to their highest development, and have lingered on till now in a greatly reduced state. Among. Please note that these images
. The doctrine of descent and Darwinism. Evolution. 70 THE DOCTRINE OF DESCENT. The Molluscs were mainly represented by Brachiopoda and Cephalopoda. However, as Bivalves and Gaster-. opoda were also in existence, the appearance of this, the most ancient molluscous fauna known, differs from the present one only in its numerical proportions, and in the circumstance, certainly very important, that of the Cephalopoda the Nautilus alone is found. The Brachio- poda soon attain to their highest development, and have lingered on till now in a greatly reduced state. Among. 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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