. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 178 ANNALS OF THE SOUTH AFRICAN MUSEUM. A B C Fig. 36. Peroniceras (Peroniceras) dravidicum Kossmat, 1895. SAS Z663, the holotype of Van Hoepen's P. (P.) multinodatum, x 1. P. (P.) multino datum van Hoepen (1965: 8, pi. 4, text-fig. If) (Fig. 36 herein) differs from the commoner forms of P. (P.) dravidicum in having an un- usually high ratio of ventral to umbiHcal tubercles (34:15), but has all the other characteristics of the species. P. (Zuluiceras) obliquenodatum van Hoepen (1965: 14, pi. 8, text-
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 178 ANNALS OF THE SOUTH AFRICAN MUSEUM. A B C Fig. 36. Peroniceras (Peroniceras) dravidicum Kossmat, 1895. SAS Z663, the holotype of Van Hoepen's P. (P.) multinodatum, x 1. P. (P.) multino datum van Hoepen (1965: 8, pi. 4, text-fig. If) (Fig. 36 herein) differs from the commoner forms of P. (P.) dravidicum in having an un- usually high ratio of ventral to umbiHcal tubercles (34:15), but has all the other characteristics of the species. P. (Zuluiceras) obliquenodatum van Hoepen (1965: 14, pi. 8, text-fig. 3f) (Fig. 37 herein) is nothing more than a coarsely ornamented variant of P. (P.) dravidicum, although the narrow umbilical width (45%) suggests that it is in this respect transitional to P. (Zuluiceras). Another form transitional to P. (Zulu- iceras), but which still falls within the limits of P. (P.) dravidicum, is P. (Zulu- iceras) bessiae van Hoepen (1965: 18, pi. 13) (Fig. 38 herein). Some of the very large forms of P. (P.) dravidicum here figured ( Figs 39-40, with very evolute whorls and club-Hke, simple ribs on the outer whorls, are reminiscent of P. (P.) westphalicum. In typical P. (P.) westphalicum, how- ever, the ribs are broad and widely spaced. The inner whorls of both species are remarkably similar, suggesting a close 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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