. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. B Fig. 9. Hyphantoceras reussianum (d'Orbigny, 1850). Cast of the original of Schliiter (1876, pi. 32 (fig. 18)). Unregistered specimen in the collections of the Geological and Palaeontological Institute, Gottingen, Germany, x 1. 1976, of the Lower Santonian. The quadrituberculate ornament of the latter (see especially Immel et al. 1982: 25, pi. 9 (fig. 3), pi. 10 (figs 1-4), pi. 11 (fig. 3)) is remarkably similar to that of M. andimakensis, although the modes of coiling are quite different. 4. Matsu
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. B Fig. 9. Hyphantoceras reussianum (d'Orbigny, 1850). Cast of the original of Schliiter (1876, pi. 32 (fig. 18)). Unregistered specimen in the collections of the Geological and Palaeontological Institute, Gottingen, Germany, x 1. 1976, of the Lower Santonian. The quadrituberculate ornament of the latter (see especially Immel et al. 1982: 25, pi. 9 (fig. 3), pi. 10 (figs 1-4), pi. 11 (fig. 3)) is remarkably similar to that of M. andimakensis, although the modes of coiling are quite different. 4. Matsumoto & Muramoto (1967: 362, pi. 19 (fig. 3), pi. 22 (fig. 1), pi. 23 (figs 1-4)) described Madagascarites ryu from the uppermost Turonian of Hokkaido. The species (Figs 10-11) has coiling as in Nipponites bacchus Matsumoto & Muramoto, 1967, with the major part of the shell consisting of U- shaped sections, terminating in a hook-shaped body chamber suspended below the early part of the shell. Tanabe et al. (1981) showed details of coiling in M. ryu, especially of the early growth of the shell, which include an initial straight shaft (Fig. 11). But instead of simple ribbing as in Nipponites, M. ryu has quadrituberculate major ribs and finer intermediary ribs (Figs 10-11). It is, in fact, a Nipponites with Hyphantoceras-VikQ ornamentation, and not a rep- resentative of Madagascarites. We presume that Madagascarites ryu arose from. 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
