. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. Fig. 49.— sqnamosns. L. Silunan. After Billings. Fig. 50.—HeterocrhiHS simplex (Meek). One c\ the least complex crinoids of that period. Lower Silurian. Fig. 51.—Body of Gly^it}- crinus. Lower Silurian. The great sub-kingdom of the Mollusca, including the bivalve and univalve shell-fishes, makes its first appearance in the Cambrian, where its earliest representatives belong to a group, the Arm-bearers or Lamp-

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. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. Fig. 49.— sqnamosns. L. Silunan. After Billings. Fig. 50.—HeterocrhiHS simplex (Meek). One c\ the least complex crinoids of that period. Lower Silurian. Fig. 51.—Body of Gly^it}- crinus. Lower Silurian. The great sub-kingdom of the Mollusca, including the bivalve and univalve shell-fishes, makes its first appearance in the Cambrian, where its earliest representatives belong to a group, the Arm-bearers or Lamp-shells (Brachiopods), held by some to be allied to worms as much as to mollusks. The oldest of all these shells are allies of the modern Lifiguice (Fig. 54), some oi. 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 Dawson, J. W. (John William), Sir, 1820-1899. London : Religious Tract Society

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea