. Elements of geology : a text-book for colleges and for the general reader. Geology. 316 PALEOZOIC SYSTEM OF ROCKS. The abundance of individuals and the number of species of this order in Silurian times are almost incredible. The accompanying figure srepresent some of the common and characteristic forms. It is very difficult to give any general distinctive mark of Silurian Brachiopods, although, of course, the species and even the genera are peculiar, and may be recognized by the paleontologist. It may be said, however, that the straight-hinged or square-shouldered Brachiopods, including the
. Elements of geology : a text-book for colleges and for the general reader. Geology. 316 PALEOZOIC SYSTEM OF ROCKS. The abundance of individuals and the number of species of this order in Silurian times are almost incredible. The accompanying figure srepresent some of the common and characteristic forms. It is very difficult to give any general distinctive mark of Silurian Brachiopods, although, of course, the species and even the genera are peculiar, and may be recognized by the paleontologist. It may be said, however, that the straight-hinged or square-shouldered Brachiopods, including the Spirifer family, the Strophomena or Leptena family, and the Productus family, are characteristic of the Palaeozoic, though not of the Silurian. Lamellibranchs.—We have said that Lamellibranchs are also found in the Si- lurian, but not so abundantly as the Brach- iopods. Lamellibranchs are divided into. 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 LeConte, Joseph, 1823-1901. New York : D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1892
