. The Canadian field-naturalist. Natural history. 122 The Canadian Field-Naturalist [Vol. XXXV with one or two clumps of Silver Birch, Betula alba var, papyrifera, and groups of Populus halsamifera. It includes, at any rate, one large grass swamp and much muskeg, and is similar to most other is- lands in the lake. The climate is typical of that of the surrounding region, dry, much of the precipitation taking the form of snow in the fairly long winter. The lake all around is frozen for 5 months or so and the temperature may drop to —40 deg. F. or sometimes lower. The southern portion of the nor
. The Canadian field-naturalist. Natural history. 122 The Canadian Field-Naturalist [Vol. XXXV with one or two clumps of Silver Birch, Betula alba var, papyrifera, and groups of Populus halsamifera. It includes, at any rate, one large grass swamp and much muskeg, and is similar to most other is- lands in the lake. The climate is typical of that of the surrounding region, dry, much of the precipitation taking the form of snow in the fairly long winter. The lake all around is frozen for 5 months or so and the temperature may drop to —40 deg. F. or sometimes lower. The southern portion of the north-west coast for 2—2^4 miles is formed by a large spit of land continuing the general line of the coast and only separated from a well-wooded island known as Burton or Little Black Island by a narrow channel 30-40 yards wide. This main spit, there- fore, includes between it and the south end of the island a large wide open bay. The spit is composed mainly of sand which on its western side takes the form of dunes rising fairly rapidly from the water but sloping more gradually on the eastern side. Near the main island the dunes are 15 to 20 feet high but the last part of the spit is almost flat. From the east side of the main spit two smaller spits are given off. The one nearer to the island runs first almost east then north-east and finally al- most north back towards the island and. Fig. 1.— Rough sketch map of Berens Island. D, Dune area; G. S., large grass and reed swamp; M. muskeg; S. the »pit on which the caanp was pitched and the collections made; S. H. Swampy 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
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