. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Orbitolites complanata, Lamarck, showing central and circumambient chamber and succeeding spirals divided into segments. X 35. (From Carpenter, ' Challenger ' Report on Orbitolites, pi. vi. fig. 2.) Fiff. Lahechia conferta. Silurian, Gothland. Young specimens : side view and view of under surface; spiral growth indicated. Natural size. The extension in the horizontal plane partly takes place by the formation of a central chamber in the course of some particular coil, but m

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. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Orbitolites complanata, Lamarck, showing central and circumambient chamber and succeeding spirals divided into segments. X 35. (From Carpenter, ' Challenger ' Report on Orbitolites, pi. vi. fig. 2.) Fiff. Lahechia conferta. Silurian, Gothland. Young specimens : side view and view of under surface; spiral growth indicated. Natural size. The extension in the horizontal plane partly takes place by the formation of a central chamber in the course of some particular coil, but mainly by the widening out of the spiral. 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 London, Taylor and Francis, Ltd

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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology