. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: Uinta Titanothere Dolichorhinus. 131 rhinoceros. However, the bone as a whole, especially its anterior border, is relatively heavier than in the tapir. The thyrohyal is unfortunately broken off on both sides. This element was perhaps relatively less developed than in Tapirus terrestris. The ceratohyal is also unfortunately broken ofif at the upper end, but its length was no doubt proportionately equal to that of the American tapir, while the shaft is less constricted antero-posterio
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: Uinta Titanothere Dolichorhinus. 131 rhinoceros. However, the bone as a whole, especially its anterior border, is relatively heavier than in the tapir. The thyrohyal is unfortunately broken off on both sides. This element was perhaps relatively less developed than in Tapirus terrestris. The ceratohyal is also unfortunately broken ofif at the upper end, but its length was no doubt proportionately equal to that of the American tapir, while the shaft is less constricted antero-posteriorly. The epihyal is not present; this bone no doubt was nodular in character, as is the case in Tapirus terrestris. The anterior portion of the shaft of the stylohyal is rounder in cross-section than in the tapir or the horse, but the upper. Fig. 3. Side view of hyoid apparatus. Figs, i and 3. (?), No. 2865; Fig. 2. Tapirus terrestris, H nat. size, th hyal, ch = ceratohyal, eh = epihyal, sh = stylahyal. Dolichorhinus longiceps = thyrohyal, hh = basi- end is flattened and terminates in enlarged processes, the superior attached to the hyoidial portion of the temporal bone and the inferior somewhat more obtusely rounded, extending downwards and out- wards. This rib-like upper end of the stylohyal is more suggestive of the rhinoceros or the horse than of the tapir. • (See Figs. 3 and 4.) Measurements. Length of skull from anterior border of the orbit to top of occiput 365 mm Antero-posterior diameter of upper molar series 125 Transverse diameter of frontals at postorbital processes i45 Depth of mandible at M^^ 7i Length of stylohyal, approximately 16S Antero-posterior diameter of basihyal, median line IS. 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. [Pitt
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