. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OP PATAGONIA 335 individual variation. For example, it is also present in some specimens of Ercthizon dormtum (Fig. ID). In Coendou hrandti we have seen the neolopli extending to the hypo- eone. Landry ligures an interesting case in Dasyprocta fuJirjinosa (1957a, PI. 5, fig. a) in which the neolopli seems to have split into two parts, one diagonal and one transverse, and we have seen the same thing in I), aguti. Evidently this part of the npper molars of caviomorphs
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OP PATAGONIA 335 individual variation. For example, it is also present in some specimens of Ercthizon dormtum (Fig. ID). In Coendou hrandti we have seen the neolopli extending to the hypo- eone. Landry ligures an interesting case in Dasyprocta fuJirjinosa (1957a, PI. 5, fig. a) in which the neolopli seems to have split into two parts, one diagonal and one transverse, and we have seen the same thing in I), aguti. Evidently this part of the npper molars of caviomorphs is (piite unstable. The angulations at the ends of the neoloph on no. 1903-3-3 would be eliminated by wear about the same time the lingual neofossette was lost (Fig. loA). The great depths of the hypofiexus, mesoflexus and jiaraflexus are strikingly apparent, the hypofiexus being the deepest, followed by the mesoflexus and. 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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