. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. A B Fig. 15. Cephalomys, uuworn aud little worn upper molars. Cephalomys plexus Ameghino. A, LM^, no. 1903-3-3, x 10. Cephalomys arci- dens Ameghino. LM^ or 2^ x 5; B, no. 1903-3-22; C, no. 1903-3-20. lingual neofossette) being large, irregularly trumpet-sliaped, but decreasing rapidly in size with depth. Only a moderate degree of wear would eliminate both parts of the metafossette entirely, and no suggestion of the presence of the neoloph would remain. The parts of the metafossette are worn
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. A B Fig. 15. Cephalomys, uuworn aud little worn upper molars. Cephalomys plexus Ameghino. A, LM^, no. 1903-3-3, x 10. Cephalomys arci- dens Ameghino. LM^ or 2^ x 5; B, no. 1903-3-22; C, no. 1903-3-20. lingual neofossette) being large, irregularly trumpet-sliaped, but decreasing rapidly in size with depth. Only a moderate degree of wear would eliminate both parts of the metafossette entirely, and no suggestion of the presence of the neoloph would remain. The parts of the metafossette are worn away in all other available material except no. P14652, where the lingual neo- fossette is preserved on ]VP (Fig. 14A). This peculiar development of a diagonal neoloph directed an- terointernally might at first glance seem to separate Cephalomys widely from all other caviomorphs. However, investigation of unworn teeth of various meml^ers of the suborder shows that it is by no means a unique feature, appearing in several forms as an. 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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