. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science. Paleontology. THE CAMBRIAN PERIOD. 8l beds of Lower Cambrian age at Bray Head, Wicklow, Ireland, some very remarkable fossils, which are well known under the. Fig. 28.—Fragment of Eophyton Linneanum, a supposed land-plant, Lower Cambrian, Sweden, of the natural size. name of Oldhamia, but the true nature of which is very doubtful. The commonest form of Oldhamia (fig. 29) consists of a thread-like stem or axis, from which spring at regular intervals bundles of short f
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science. Paleontology. THE CAMBRIAN PERIOD. 8l beds of Lower Cambrian age at Bray Head, Wicklow, Ireland, some very remarkable fossils, which are well known under the. Fig. 28.—Fragment of Eophyton Linneanum, a supposed land-plant, Lower Cambrian, Sweden, of the natural size. name of Oldhamia, but the true nature of which is very doubtful. The commonest form of Oldhamia (fig. 29) consists of a thread-like stem or axis, from which spring at regular intervals bundles of short filamentous branches in a fan-like manner. In the locality where it occurs, the fronds of Oldhatnia are very abundant, and are spread over the surfaces of the strata in tangled layers. That it is organic is certain, and that it is a calcareous sea-weed is probable ; but it may possibly belong to the sea-mosses (Folyzoa), or to the sea-firs {Sertularians). Amongst the lower forms of animal life {Protozoa), we find the Sponges represented by the curious bodies, composed of netted fibres, to which the name of Protospongia has been given (fig. 32, a)\ and the comparatively gigantic, conical, or cylin- F. 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 Nicholson, Henry Alleyne, 1844-1899. Edinburgh, London, Blackwood
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Keywords: ., bookaut, bookcentury1800, bookdecade1870, booksubjectpaleontology
