. The Canadian field-naturalist. y5cctte I-11 ^ - 'i^clJ'S bTO S It- Diagram of runways and burrows of two colonies of Pallid Meadow Mice at Rock Creek Saskatchewan division of the Transition Zone. The species has a relatively restricted range in southern Alberta and Saskatchewan, where latitudes obtain be- tween 2,000 and 3,400 feet above sea-level. It seems evident, also, that the centre of abundance of the species in Canada lies between the Missouri Coteau region (104°W. )on the east, and Val Marie on the west. East of the 104th meridian the country undergoes a notable change in topogr
. The Canadian field-naturalist. y5cctte I-11 ^ - 'i^clJ'S bTO S It- Diagram of runways and burrows of two colonies of Pallid Meadow Mice at Rock Creek Saskatchewan division of the Transition Zone. The species has a relatively restricted range in southern Alberta and Saskatchewan, where latitudes obtain be- tween 2,000 and 3,400 feet above sea-level. It seems evident, also, that the centre of abundance of the species in Canada lies between the Missouri Coteau region (104°W. )on the east, and Val Marie on the west. East of the 104th meridian the country undergoes a notable change in topography and vegetation, with a rapid falling off in altitude. West of this point is the high, semi-arid plain with its bad-lands, cactus and sage-brush—a land of ranching; east of it is lower, undulating prairie given over to farming. The Pallid Mouse was not detected east of Big Muddy Lake, which lies near the natural boundary between the western semi-arid, and the eastern humid divisions, of the Transition 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 Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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