. The Canadian field-naturalist. February, 1933] The Canadian Field-Naturalist 33 William Markwick, afterwards Eversfield (1739- 1813), lived at Catsfield in Sussex and was much interested in the natural history of that countr3^ He became an Associate of the Linnean Society in 1788 and a Fellow in 1792. He corresponded with Gilbert White and most editions of "The Natural History and Antiquities of Selborne" contain Markwick's "Naturalists ; Many of his manscripts are in the possession of the Linnean Society; in addition to the "Florula Canadensis" there a
. The Canadian field-naturalist. February, 1933] The Canadian Field-Naturalist 33 William Markwick, afterwards Eversfield (1739- 1813), lived at Catsfield in Sussex and was much interested in the natural history of that countr3^ He became an Associate of the Linnean Society in 1788 and a Fellow in 1792. He corresponded with Gilbert White and most editions of "The Natural History and Antiquities of Selborne" contain Markwick's "Naturalists ; Many of his manscripts are in the possession of the Linnean Society; in addition to the "Florula Canadensis" there are (1) "Plantae Sus- sexienses" communicated to the Society on 16 November and 21 December, 1802, but not print- ed, (2) "British Zoology, containing descriptions and figures of several species of Fish and Mollusca found on the coast of Sussex," (3) "Remarks on British Birds," and (4) "Descriptions and Figures of ; There are some interesting notes on these manuscripts by J. E. F. Harting in the "Zoologist," 1890, p. 335. THE ''BLUE LIMESTONE'* OF HASTINGS COUNTY, ONTARIO* By M. E. WILSON NEAR THE southern border of the Cana- dian Pre-Cambrian Shield, in the cen- tral part of Hastings county, southeast- ern Ontario, there are widespread areas of a most unusual-looking rock that has long been known as the "blue ; This limestone, called "blue" because of the deep colour of its weathered surface is everywhere finely bedded and in many places contains interstratified beds of slate or argillite. (Figure 1). In a few localities, also, but only in its lowermost part, it includes beds of buff-weathering dolomite. * Published with the permission of the Director, Geological Survey of Canada, Department of Mines, Ottawa. In every outcrop of rock there is recorded some information regarding the story of our earth in the region where the outcrop occurs. Thus in the two outcrops of the "blue limestone
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