. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Douglass : Vertebrates from Montana Tertiary 183 greater angle than in Arctomys monax. The most peculiar character- istic is the presence of two chambers opening posteriorly between the posterior nares and the posterior portion of the palate. I have not observed this in any other animal. Paliearctotnys moutaiiiis is the type of the genus. montanus sp. nov. No. 740. Fig. 23. This species is represented by a large part of a skeleton found in the same beds as P. macrorhinus. The sk
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Douglass : Vertebrates from Montana Tertiary 183 greater angle than in Arctomys monax. The most peculiar character- istic is the presence of two chambers opening posteriorly between the posterior nares and the posterior portion of the palate. I have not observed this in any other animal. Paliearctotnys moutaiiiis is the type of the genus. montanus sp. nov. No. 740. Fig. 23. This species is represented by a large part of a skeleton found in the same beds as P. macrorhinus. The skull is longer in the pres- ent species. The upper incisors have more longitudinal ridges on the anterior faces ; the transverse dmeiater is somewhat less and teeth are. Fig. 23. Pahrarctouiys montanus (No. 740). Lower Madison Valley. Skull and mandible. Natural size. longer, /. e., they project farther from the jaws. The skull does not differ greatly from that q{ Arctoviys monax so far as shown except in what, for convenience, I will call the post-palatine cavities, and in the size of the muzzle. The incisors are very much larger than in that species. Not all of the skull is preserved. The mandible resembles that of Arctomys, but is very much more robust. This is especially noticeable in the anterior part, where it 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. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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