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 Ch. XXVII.] CARADOC AND BALA BEDS. 563 which ranges from the base to the summit of the formation, usu- ally accompanied by Strophomena grandis (see fig. 645), and Orthis vespertilio (fig. 644), with many other fossils. Fig. 643. 645.

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