. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Palcechinus gigas, M'Coy. Eeduced. Mountain Limestone. Ireland. Productus semireticulatits, Martin, sp. (P. antiquatus, Sow.) Mountain Lime- stone. England; Eussia; the Andes, &c. Echinus. The other, Archceocidaris, represents, in like manner, the Cidaris of the present seas. Of Mollusca the Brachiopoda (or Palliobranchiates) constitute the larger part, and are not only numerous, but often of large size. Per- haps the most characteristic shells of the formation a
. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Palcechinus gigas, M'Coy. Eeduced. Mountain Limestone. Ireland. Productus semireticulatits, Martin, sp. (P. antiquatus, Sow.) Mountain Lime- stone. England; Eussia; the Andes, &c. Echinus. The other, Archceocidaris, represents, in like manner, the Cidaris of the present seas. Of Mollusca the Brachiopoda (or Palliobranchiates) constitute the larger part, and are not only numerous, but often of large size. Per- haps the most characteristic shells of the formation are large species of Productus, such as P. giganteus, P. hemisphcericus, P. semireticulatus (fig. 570), and P. scabriculus. Large plaited spirifers, as Spirifer stria- tics, S. rotundatus, and S. trigonalis (fig. 571), also abound; and smooth species, such as Spirifer glaber (fig. 572), with its numerous varieties. The family of the brachiopoda to which these shells belong, is far. 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 Lyell, Charles, Sir, 1797-1875. New York, D. Appleton and co.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1868
