. Bulletin. Natural history; Natuurlijke historie. 70 PEABODY MUSEUM BULLETIN 28. FIGURE 14. Bones and teeth of Gaudeamus aegyptius. Lower jaws X 5, rest X 10. A. Right P*-M^ anterior end to the right, YPM 18044. B. Anterior view of YPM 18044, showing presumed size of infraorbital foramen. C. Lateral view of lower jaw, CM 26920, holotype. D. Left dPi, CM 26920, holotype. E. Left P^-M,, CM 26920, holotype. P^ shown rotated into same plane as other teeth, and erupted. F. Superior view of left lower jaw, YPM 18036. G. Right dPt-Mi, YPM 18022. H. Left M,, AMNH 8225. The protoconule is united with
. Bulletin. Natural history; Natuurlijke historie. 70 PEABODY MUSEUM BULLETIN 28. FIGURE 14. Bones and teeth of Gaudeamus aegyptius. Lower jaws X 5, rest X 10. A. Right P*-M^ anterior end to the right, YPM 18044. B. Anterior view of YPM 18044, showing presumed size of infraorbital foramen. C. Lateral view of lower jaw, CM 26920, holotype. D. Left dPi, CM 26920, holotype. E. Left P^-M,, CM 26920, holotype. P^ shown rotated into same plane as other teeth, and erupted. F. Superior view of left lower jaw, YPM 18036. G. Right dPt-Mi, YPM 18022. H. Left M,, AMNH 8225. The protoconule is united with the metacone and separated from the paracone by a valley as deep as that between the paracone and the anterior cingulum. The lower molars are similar in their basic pattern to those of Phiomys, but are much more lophate. The protoconid extends to the anterior margin of the tooth, and the metaconid ends linguad of it. In most unworn teeth (figs. 14 E, G, 15 B, C), the two are separated. However, in YPM 18024 and 18032 (fig. 15 E, G) there is no separation between the two. The metaconid may curve posteriorly and end in an arc, as in Mi of the holotype (fig. 14 E) and of YPM 18024; there may be a buccal swelling of the end of the metaconid, as in Mg of YPM 18024. 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 Peabody Museum of Natural History. New Haven : The Museum
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