. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZANGERL AND MEDEM : NEW CHELID TURTLE 381 The skull is illustrated in Figures 2-4. It is very large relative to the size of the animal, its total length being about 30 per cent of the straight length of the carapace in the adult, about 45 per cent of that length in the hateliling (see PI. 2). The skull (Figs. 2-4) shows all the typical features of that of Phrynops (Batrachemys) nasuta as pictured by Boulenger (1889). The differences are probably due, to some extent, to the fact that Boulenger's specimen was a very old
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZANGERL AND MEDEM : NEW CHELID TURTLE 381 The skull is illustrated in Figures 2-4. It is very large relative to the size of the animal, its total length being about 30 per cent of the straight length of the carapace in the adult, about 45 per cent of that length in the hateliling (see PI. 2). The skull (Figs. 2-4) shows all the typical features of that of Phrynops (Batrachemys) nasuta as pictured by Boulenger (1889). The differences are probably due, to some extent, to the fact that Boulenger's specimen was a very old and large indi- vidual, and some of the sutures may not have been visible (as. Figure 2. Skull of Phrynops (Batrachemys) dahli type specimen. Dorsal view. for example the suture between opisthotic and supraoccipital) ; also there are differences in proportion, the skull of the Colombian species being notably more pointed anteriorly — which may or may not be a specific character. In dahli the maxillary rim lateral to the orbit is relatively narrower than in nasuta and the suture between opisthotic and squamosal on the dorsal side of the otic region of the skull reaches much farther mediad than in the compared species. The basisphenoid of dahli 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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