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 Ostrea gregarea. Coral-rag, Steeple Ashtou. Xe rincea hieroglyph lea. Coral-rase. Nerinma Goodhallii, Fitton. Coral-rag, Weymouth. I nat. size. of the columella. Ar. Goodhallii (fig. 395) is another English spe- cies of the same genus, from a formation which seems to form a passage from the Kimmeridge clay to the coral-rag.'4'' A division of the oolite in the Alps, regarded by most geologists as coeval with the Engl

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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 Ostrea gregarea. Coral-rag, Steeple Ashtou. Xe rincea hieroglyph lea. Coral-rase. Nerinma Goodhallii, Fitton. Coral-rag, Weymouth. I nat. size. of the columella. Ar. Goodhallii (fig. 395) is another English spe- cies of the same genus, from a formation which seems to form a passage from the Kimmeridge clay to the coral-rag.'4'' A division of the oolite in the Alps, regarded by most geologists as coeval with the English coral-rag, has been often named ' Cal- caire a Dicerates,' or ' Diceras limestone,' from its containing abun- dantly a bivalve shell (see fig. 396) of a genus allied to the Chama. Fie. Fig. Cast ef Diceras arietina. Coral-rag, France.

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