. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. i *r 9)1 'â 'â â 11'II If. ^11 ii: 928 MONOGRAPHS OF NORTH AMKRICAN KODBNTIA. iiiulcr (lie head of A. caligatiis:â"There is a living animal of this species now ill the Zoological Gardens. It was brought to England by Mr. King, Surgeon to Captain Back's overland Expedition, and is figured and described in his recent work under the appellation of Arctomys ochanaganus, derived from the river upon whose banks it was caught. The Arctomys pruinosus of Pennant is perhaps the same with caligatus
. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. i *r 9)1 'â 'â â 11'II If. ^11 ii: 928 MONOGRAPHS OF NORTH AMKRICAN KODBNTIA. iiiulcr (lie head of A. caligatiis:â"There is a living animal of this species now ill the Zoological Gardens. It was brought to England by Mr. King, Surgeon to Captain Back's overland Expedition, and is figured and described in his recent work under the appellation of Arctomys ochanaganus, derived from the river upon whose banks it was caught. The Arctomys pruinosus of Pennant is perhaps the same with caligatus, but the brief account of it in Arctic Zoology is insufficient to ; This specimen, as Audubon and nian inform us, is also tlie original of their Arctomys pruinosus, to which they likewise refer the A. caligatus of Eschscholtz. Middendorff, in 1851, partly from a comparison of descriptions and fig- ures and partly upon theoretical grounds, considered the large Marmot of Kamtschatka as specifically identical with the A. pruinosus of Audubtm and Bachman, both qf which (including also the A. einpetra of authors and the A. melanopm of Kuhl) he considered as identical with A. monax. Hence he strangely employs this name for the designation of the Kamtschatkan species, previously named A. camtschatica by Brandt. At the same time, he was inclined to regard the A. caligatus, owing mainly to differences of color, as dis- tinct from the Kamtschatkan Marmot and from the A. monax of North America. Dr. Richardson, ap])arently on the authority of Harmon and the fur traders, gave the range of A. pruinosus as extending from latitude 46° to 62° in the Rocky Mountains. Pennant's specimen is said to have come from Hudson's Bay, and there are specimens in the present collection from Wash- ington Territory, Forts Good Hope, Liard, and Yukon, in the Mackenzie River District, and from Fort Henry, Alaska. Ross gi\es its range as extend- ing northward to the Arctic Circ
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