. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. LOVERIDGE AND WILLIAMS: AFRICAN CRYPTODIRA 377 external character by which juvenile Kinixys may be recognized. The presence of the so-called "submarginals" of Siebenrock — one or more supernumerary scutes internal to the ventral sur- face of the second marginal — is also diagnostic of the genus, but these vary much in size and are not always easily visible. Osteologically, there are various features unconnected with the hinge that make Kinixys a specially distinctive genus — though some of these features are
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. LOVERIDGE AND WILLIAMS: AFRICAN CRYPTODIRA 377 external character by which juvenile Kinixys may be recognized. The presence of the so-called "submarginals" of Siebenrock — one or more supernumerary scutes internal to the ventral sur- face of the second marginal — is also diagnostic of the genus, but these vary much in size and are not always easily visible. Osteologically, there are various features unconnected with the hinge that make Kinixys a specially distinctive genus — though some of these features are shared with one or another related genus. One minor point is the position of the costomar-. Fig. 43. Kinixys erosa (Yale Mus. 5403) (x %). Internal view of left anterior edge of carapace; sm = submarginal scale. (P. Washer del.) ginal sulcus with reference to the pleuroperipheral suture. Whereas in tortoises generally there is complete, or almost com- plete, congruence between these two landmarks, in Kinixys the costomarginal sulcus is, at least on the posterior half of the shell, well down on the peripherals. In this respect Pyxis and Acinixys are somewhat like Kinixys, and the feature is probably an emy- dine inheritance, as is also the case with the position of the vertebral-supracaudal sulcus on the pygal in Kinixys (well down on the pj'gal in K. erosa and homeana, higher in helliana). Another peculiarity, shared with Chersina however, is. 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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