. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 158 Annals of the Carnegie Museum. assume the molar pattern. There are internal cingula on the last two premolars. The lower teeth are much like those of H. agraiius. The atlas is much like that of Protapirus validiis. The concavity for the odontoid process of the axis is much narrower, indicating a thick, conical odontoid. The posterior cotyles are wider dorso- ventrally, the lower part is longer antero-posteriorly on the median line, and there is quite a large protuberance on the ventral po
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 158 Annals of the Carnegie Museum. assume the molar pattern. There are internal cingula on the last two premolars. The lower teeth are much like those of H. agraiius. The atlas is much like that of Protapirus validiis. The concavity for the odontoid process of the axis is much narrower, indicating a thick, conical odontoid. The posterior cotyles are wider dorso- ventrally, the lower part is longer antero-posteriorly on the median line, and there is quite a large protuberance on the ventral posterior border, projecting backward. Measurements. Mm. Width of palate between second premolars 38 Length of I- 8 Width of 12 5 Length of premolar series Length of PL 10 Width of Pi 7 Length of P- Width of P^ 12 Length of P^ 13 Width of P^ Length of P^^ WidthcfP* 22 Length of mandible about 250 Width " at symphysis, narrowest 26 Depth " mider Pl 38 Depth " under M^ 47 Length of inferior molar-premolar series 98 From same locality as the preceding. Hyrachyus. No. 718. Fig. 3. Represented by a solitary last upper molar found about a half mile from HeptodoJi (No. 717) and Hyra- cliyiis pn'sci/s (No. 784) described in this paper. It "hm resembles the corresponding tooth of Hyrachyus inter- FiG 1 Ilvra- I'ledms (Princeton collection. No. 10,095). The ante- c hy us? N o. rior cross-crest is more nearly straight, and being broader 718. Crown at the base, makes the median transverse valley more view of last narrow. The anterior inner cusp is more conical. "^^"^ The anterior outer style (parastyle) is not so much molar. Sage Creek beds * external to the anterior outer cusp. The posterior nat. size. Outer cusp (metacone) is small, thin, laterally com-. 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 perfectl
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