. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: A New Titanothere from the Uinta Eocene. 39 Oligocene; the articulating surface for the atlas is located more laterally, and the postzygapophysis has a greater vertical obliquity and a more nearly rounded outline than in the latter. In the Princeton specimen^- it is seen that the attcrial canal is located back of the pos- terior edge of the articulation for the atlas, while in Diploceras oshorni the foramen is, on a direct side view, partially hidden by the back- wardly extended pro
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: A New Titanothere from the Uinta Eocene. 39 Oligocene; the articulating surface for the atlas is located more laterally, and the postzygapophysis has a greater vertical obliquity and a more nearly rounded outline than in the latter. In the Princeton specimen^- it is seen that the attcrial canal is located back of the pos- terior edge of the articulation for the atlas, while in Diploceras oshorni the foramen is, on a direct side view, partially hidden by the back- wardly extended process of the articulation. I judge that the axis, as a whole, in the present form is relatively shorter than in'the Prince- ton specimen. In more minute details the description of Scott and Osborn (/. c, p. 514) agrees well with the parts pieserved, in the speci- men before me, i. e., the heavy spine overhanging the postzygapo- physes, the inner turn of the transverse process, and a prominent in- ferior keel. The succeeding four cervical vertebrae in the paratype, No. 2860, are represented only by fragments. They appear to have short opisthocoelian centra, as in Diplacodon, described by Marsh and Osborn, and a prominent ventral Fig. 5. Diploceras oshorni Peterson cervical and dorsal vertebrae. (Paratype. No. 2860.) Last The seventh cervical vertebra is completely worked out in half relief and shows the chief characteristic features. Fig. 5. The long and pointed spinous process is well shown, as is also the neural arch and the centrum. The pre- and post-zygapophyses are, as in the axis, located quite laterally and face directly upward and downward as in Titanotheriiim. The transverse process shows a tendency to develop the broad round termination found in T. validiim of the Oligocene. Theie are eight doisal vertebrae which are worked out in half 12 Scott, W. B., and Osborn, H. F., "The Mammalia of the Uinta Formation," Trans. Amer. Philos. Soc, Vol. XVI, Part III
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