. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. 440 THE CARBONIFEROUS SYSTEM. described by Goeppert as Araucarites carbonarius is probably also Sigillarian. 2. Calamodendron or Calamitea.—These plants are much less known than the proper Sigillarias, and it is perhaps doubtful if they should not form a separate family. In the meantime I place them here, simply because they seem to approach more nearly to Sig
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. 440 THE CARBONIFEROUS SYSTEM. described by Goeppert as Araucarites carbonarius is probably also Sigillarian. 2. Calamodendron or Calamitea.—These plants are much less known than the proper Sigillarias, and it is perhaps doubtful if they should not form a separate family. In the meantime I place them here, simply because they seem to approach more nearly to Sigillarice than any other plants in their structure. They were of less massive growth than Sigillnrice, being rarely more than a few inches in diameter; they had stems fluted lengthwise like Sigillaria, but more distinctly divided into nodes or joints by the scars of branches which were borne in whorls, and carried their narrow, slender leaves. In their habit of Fig. 162.— (a, h) Casts of axis in sandstone, with wooily envelope, rciluceil. (c, rf) Woody tissue, liiglily niagniliud. growth they thus resembled the pine tribe, and they seem to have had a larger amount of true wood in their stems than was the case with Sigillaria. This cylinder of wood contained a thick pith, which was constricted at intervals into joints, and had also a longitudinal striation on the outside; and as this pith from its ready decay admitted sand into the interior of the stem, while the wood was entire or in process of conversion into coal, we often have a stem of Calamodendron repre- sented merely by a cast of the pith in stone. In this case the pith cylinder may be easily mistaken for a plant of the genus Calamites, which, as we shall immediately find, was quite a diflFerent thing. I. 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 resemb
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
