. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 82 Annals of the Carnegie Museum. importance. When compared with Achcenodon the teeth of Parahyns vagus are proportionally larger in relation to the size of the jaw,. Fig. 12. Parahyus vagus. From a cast in the Carnegie Museum. No. 3448. Original type specimen in Peabody Museum of Natural History. which is much slenderer and has a different contour from that of Achcenodon, the under border being straighter fore-and-aft. Dentition I?3". Cy, P3, M3-. Premolars more compressed laterally tha
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 82 Annals of the Carnegie Museum. importance. When compared with Achcenodon the teeth of Parahyns vagus are proportionally larger in relation to the size of the jaw,. Fig. 12. Parahyus vagus. From a cast in the Carnegie Museum. No. 3448. Original type specimen in Peabody Museum of Natural History. which is much slenderer and has a different contour from that of Achcenodon, the under border being straighter fore-and-aft. Dentition I?3". Cy, P3, M3-. Premolars more compressed laterally than in Achcenodon, especially A. uintense. The dentition is proportionally longer, M-g- being one third narrower while of the same actual length as in A. rohustus. The cross-valleys between the posterior and anterior tubercles of the molars are wider and the heel of Mg- is more distinctly separated from the main body of the tooth than in Achce- nodon. In the type of Parahyus aberrans Marsh the external tubercles of the upper molar possess more conical symmetry than in Achcenodon, and, as in the lower teeth of the type of Parahyus vagus, the tubercles of the upper tooth of Parahyus aberrans are also separated by more clearly defined valleys than in Achcenodon. Family Genus Protoreodon Scott and Osborn. 22. Protoreodon medius sp. nov. (Plate XL, Figs. 1-16). Type: Greater portion of the skeleton, C. M. No. 2962. Horizon: Uinta Eocene, Horizon C. Locality: Six miles east of My ton, on the Duchesne River, Utah. Besides the type specimen there are numerous fragmentar\- remains,. 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 Carnegie Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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