. The Canadian naturalist and geologist. Natural history -- Periodicals. Silurian Fossils. 315 These remains are quite common in the Silurian rocks of Canada, and wherever a river has worn away the loose soil, and in low water leaves a few yards of flat rock bare, the remains of Orthocer- atites may be seen. In some of the species the siphuncle wa& composed of a number of more or less globular divisions, and in such instances, where it is seen imbedded in the stone, it bears a certain resemblance to the back-bone of a fish. The rings of the siphuncle represent the joints, and the septa the
. The Canadian naturalist and geologist. Natural history -- Periodicals. Silurian Fossils. 315 These remains are quite common in the Silurian rocks of Canada, and wherever a river has worn away the loose soil, and in low water leaves a few yards of flat rock bare, the remains of Orthocer- atites may be seen. In some of the species the siphuncle wa& composed of a number of more or less globular divisions, and in such instances, where it is seen imbedded in the stone, it bears a certain resemblance to the back-bone of a fish. The rings of the siphuncle represent the joints, and the septa the ribs, and they are often mistaken for the remains of vertebrated fishes, although none of that department of animated beings existed in the Silurian seas. Many of the species were of diminutive size, in fact mer© pigmies when compared with some of their gigantic brethren,. Two of these we shall figure in the present article, leaving the discussion of the others for the next number of this 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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