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 Fig. 655. Asaphus tyrannus. Murcb. Llandeilo; Bishop's Castle, &c. )ia BucMi, Burm. Syn. Asaphus Buchii, Brongn. Builth, Eadnorshire ; Llandeilo, Caermartbenshire. Beneath the black slates above described of the Llandeilo forma- tion, graptolites are still found in great variety and abundance, and the characteristic genera of shells and trilobites of the Lower Silurian rocks are still traceable downwards, in Shro

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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 Fig. 655. Asaphus tyrannus. Murcb. Llandeilo; Bishop's Castle, &c. )ia BucMi, Burm. Syn. Asaphus Buchii, Brongn. Builth, Eadnorshire ; Llandeilo, Caermartbenshire. Beneath the black slates above described of the Llandeilo forma- tion, graptolites are still found in great variety and abundance, and the characteristic genera of shells and trilobites of the Lower Silurian rocks are still traceable downwards, in Shropshire, Cumberland, and

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