. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Chelodina rarkeri • Rhodin and Mittermeier 469 Prefrontal spine Sulcus jugalis Fossa temporalis superior. Cristo jugalis Cavum tympani Post-otic antrum Precolumellar fossa Fenestra hyoideus iall Figure 6. Lateral view of the skull of C. siebenrocki (AMS 40696). The labelled terms include new terms introduced in this paper and defined in Appendix I. midline in very large females. Surface of carapace weakly rugose with reticulate pattern of numerous, very shallow furrows. Furrows on vertebrals oriented longitudi- nally
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Chelodina rarkeri • Rhodin and Mittermeier 469 Prefrontal spine Sulcus jugalis Fossa temporalis superior. Cristo jugalis Cavum tympani Post-otic antrum Precolumellar fossa Fenestra hyoideus iall Figure 6. Lateral view of the skull of C. siebenrocki (AMS 40696). The labelled terms include new terms introduced in this paper and defined in Appendix I. midline in very large females. Surface of carapace weakly rugose with reticulate pattern of numerous, very shallow furrows. Furrows on vertebrals oriented longitudi- nally along midline; furrows on pleurals not oriented in any particular way. Length of dorsal surface of nuchal scute usually greater than width, averaging in length: width ratio. All 27 specimens examined had fully formed nuchal scutes. Width of ven- tral surface of nuchal scute greater than length, averaging in length:width ratio (Fig. 3). Anterior ventral marginals form a narrow rim between edge of carapace and attachment of skin from dorsal surface of neck; carapace averages times longer than width of second ventral marginal. Width of fifth vertebral greater than length, with the length:width ratio averaging Shape of pleurals and first four vertebrals apparently not significant. Twelve marginals on each side of carapace; fifth marginal always in contact with first pleural; eleventh marginal usually in broad contact with fifth vertebral (Figs. 1, 2, 9). Plastron. Plastron fairly elongate and narrow (Figs. 1, 3). Carapace width av- eraging times plastron width; carapace length averaging times plastron width; length of plastron itself averaging Corpus hyoideus. 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.
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