. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. THE AGE OF INVERTEBRATES OF THE SEA. S3 that Geinitz has described two species from the Permian which he believed to be early precursors of the Spongillae, or fresh- water spopges; but more recently he seems to regard them as probably Algae. Young has, however, recently found true spicules of Spongilla in the Purbeck beds.^ A stage higher than the sponges are those little polyp-like animals with sac-like bodies and radiating
. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. THE AGE OF INVERTEBRATES OF THE SEA. S3 that Geinitz has described two species from the Permian which he believed to be early precursors of the Spongillae, or fresh- water spopges; but more recently he seems to regard them as probably Algae. Young has, however, recently found true spicules of Spongilla in the Purbeck beds.^ A stage higher than the sponges are those little polyp-like animals with sac-like bodies and radiating arms or tentacles, which form minute horny c- calcareous cells, and bud out into branching communities, looking to untrained eyes like delicate sea-weeds—the sea-firs and sea-mosses of our coasts (Fig. 36). These belong to a very old group, for in the oldest Cambrian we have a form referred to this type (Fig. 33), and in the. 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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