. Bulletin - United States National Museum. Science. MAMMALS OF THE MEXICAN BOUNDARY. 351 when compared with the beaver of Ajizona and Sonora. There being at present no i'orest connection between the habitats of Castor fiber and C. canadensis in their respective geographic ranges, and conse- quently no continuity of habitat, there can be no question as to their specific distinctness. The skull t' C. canadensis frondator (fig. 57) differs from that of typical 0. canadensis in being much larger, with more spreading Please note that these images are extracted from scanned page images t
. Bulletin - United States National Museum. Science. MAMMALS OF THE MEXICAN BOUNDARY. 351 when compared with the beaver of Ajizona and Sonora. There being at present no i'orest connection between the habitats of Castor fiber and C. canadensis in their respective geographic ranges, and conse- quently no continuity of habitat, there can be no question as to their specific distinctness. The skull t' C. canadensis frondator (fig. 57) differs from that of typical 0. canadensis in being much larger, with more spreading 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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