. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZANGERL AND MEDEM : NEW CHELID TURTLE 383 The skull of the type specimen (Fig. 2) shows an interesting abnormality. The extremely thin posttemporal bar, normallj^ formed to about equal measure by the parietals and the squa- mosals, includes two supernumerary bones on the right side; on the left side the bar was injured, but since the remaining prongs of the bar are the sutural ends of the parietal and squamosal bones we must assume that the abnormal condition was paired. The hyoid apparatus is w^ell ossified and compl
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZANGERL AND MEDEM : NEW CHELID TURTLE 383 The skull of the type specimen (Fig. 2) shows an interesting abnormality. The extremely thin posttemporal bar, normallj^ formed to about equal measure by the parietals and the squa- mosals, includes two supernumerary bones on the right side; on the left side the bar was injured, but since the remaining prongs of the bar are the sutural ends of the parietal and squamosal bones we must assume that the abnormal condition was paired. The hyoid apparatus is w^ell ossified and complex (Fig. 5). The hyoid body consists anteriorly of two pairs of bones and. Figure 5. Hyoid apparatus of Phrynops {Batrachemys) dahli type speci- men, drawn from X-ray plate. posteriorly of an elongated unpaired element thiLs evidently ossifying from five distinct centers as noted by Siebenrock (1899). As in other forms (for example in Clenimys), there is a pair of cartilages associated with the anterolateral part of the hyoid body, that has been identified as reduced hyoid horns (Romer, 1956, p. 421). The cornua branchialia I are attached to the complex copula where the second pair of elements join the unpaired plate. The distal tips of these branchial horns seem to have separately ossified (or calcified — a definite identification. 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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