Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 OMTiamia racliata, Forbes. Wicklow, Ireland. Oldhamia an-iiqua, Fortes. WickloTV, Ireland. CAMBRIAX ROCKS OF BOHEMIA (Primordial Zone of Barrande.) I have already spoken (p. 574) of the splendid results of M. Bar- rande's labors, published in 1846, in which year, after a prolonged investigation of the geology of Bohemia, he discovered a great series of palaeozoic formations, for which he adopted Sir R. Murchison'
Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 OMTiamia racliata, Forbes. Wicklow, Ireland. Oldhamia an-iiqua, Fortes. WickloTV, Ireland. CAMBRIAX ROCKS OF BOHEMIA (Primordial Zone of Barrande.) I have already spoken (p. 574) of the splendid results of M. Bar- rande's labors, published in 1846, in which year, after a prolonged investigation of the geology of Bohemia, he discovered a great series of palaeozoic formations, for which he adopted Sir R. Murchison's general name of Silurian. The first or most ancient of his three Silurian faunas, called by him primordial, corresponds with the Brit- ish Upper Cambrian, as above described. The second tallies with Murchison's Lower Silurian, and the third with the Upper Silurian of the same author. When M. Barrande, a French naturalist, undertook single-handed the survey of Bohemia, all the described species of fossils previously obtained from that country scarcely exceeded twenty in number, whereas he had already acquired in 1850 no less than 1100 species; namely, 250 crustaceans (chiefly trilobites), 250 cephalopods, 160 gasteropods and pteropods, 130 acephalous mol- lusks, 210 brachiopods, and 110 corals and other fossils. At a later period, 1856, M. Barrande states that he had in his collection be-
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