. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OF PATAGONIA 319 to the incisor. The latter extended at least as far back as the end of the molar series, and the snrrounding bone forms a shelf on the inner face of the ramus (Fig. lOD). Externally, the alveolar border of M;5 is broken away; the ascending ramus may have begun to arise from this region, as in other members of the family. For a member of the Chinchillidae, this is a primitive jaw. In the living forms the masseteric crest is reduced to the B. Please note that these
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OF PATAGONIA 319 to the incisor. The latter extended at least as far back as the end of the molar series, and the snrrounding bone forms a shelf on the inner face of the ramus (Fig. lOD). Externally, the alveolar border of M;5 is broken away; the ascending ramus may have begun to arise from this region, as in other members of the family. For a member of the Chinchillidae, this is a primitive jaw. In the living forms the masseteric crest is reduced to the B. 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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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
