. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. KUMMEL : POST-TRIASSIC NAUTILOID GENERA 431 Sowerby's type specimen does not appear to be in the British Museum, but the specimen referred to by Foord (1891, p. 245) labelled ^'Nautilus uiidulatus, M. C. 182" in Sowerby's hand- writing is figured here, Plate 20, figures 1, 2, and Text Figure 26. This specimen is also numbered 66336. Dr. L. F. Spath kindly informs me that this specimen is unlocalized, but. Fig. 26. Anglonautilus undulatus (Sowerby). Diagrammatic cross sec- tion of adoral part of living ch
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. KUMMEL : POST-TRIASSIC NAUTILOID GENERA 431 Sowerby's type specimen does not appear to be in the British Museum, but the specimen referred to by Foord (1891, p. 245) labelled ^'Nautilus uiidulatus, M. C. 182" in Sowerby's hand- writing is figured here, Plate 20, figures 1, 2, and Text Figure 26. This specimen is also numbered 66336. Dr. L. F. Spath kindly informs me that this specimen is unlocalized, but. Fig. 26. Anglonautilus undulatus (Sowerby). Diagrammatic cross sec- tion of adoral part of living chamber of topotype represented by figures 1, 2, Plate 20, X 1. undoubtedly is a topotype from Nutfield, Surrey. This specimen is incomplete consisting only of two camerae of phragmocone and one-third whorl of living chamber. However, it shows clearly the most diagnostic feature of the genus, that is the large, fold- like undulations which are most prominent on the venter and decrease rapidlj^ on the flanks. The suture forms a very shallow ventral lobe and a l)road shallow lateral lobe. The siphuncle is subcentral in position being nearer the dorsum than the venter. Tn addition to the type species which is known from Aptian to Cenomanian strata in England and various localities in Europe {]ide Foord, 1891, p. 244), Nautilus suhalbensis SinzoA\ (1913) and N. hegudensis Kilian and Reboul (1915) should be included in Anglonautilus. The former species is from Albian strata in the Crimea and the latter from Hauterivian strata in southern France. Genus EuCYMATOCERAS Spath, 1927 Eucymatoceras Spath, 1927a, pp. 21, 22, 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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