. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. Fig. 20. Fig. 22. Fig. 20.—BcLthyurus capax. The lower figure is a longitudinal sec- tion, shewing the convexity of the glabella and the flat sloping rim of the front margin at a. Fig. 21.—Bathyurus dubius. Fig. 22.—Bathyurus bituberculatus. The anterior margin of the head to front of the glabella is strengthened by a fiat rim, which slopes downwards and for- wards at an angle of about 60°, with the horizontal plane of the body. This character is constant in heads specimens of all sizes, from a leno-th of six li

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. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. Fig. 20. Fig. 22. Fig. 20.—BcLthyurus capax. The lower figure is a longitudinal sec- tion, shewing the convexity of the glabella and the flat sloping rim of the front margin at a. Fig. 21.—Bathyurus dubius. Fig. 22.—Bathyurus bituberculatus. The anterior margin of the head to front of the glabella is strengthened by a fiat rim, which slopes downwards and for- wards at an angle of about 60°, with the horizontal plane of the body. This character is constant in heads specimens of all sizes, from a leno-th of six lines to thirteen. The width of this rim in. 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 Natural History Society of Montreal. Montreal, Dawson

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