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 Gh. MOLLUSCA, BRYOZOA, SPONGES. 329 Europe, a single representative only (fig. 312) has been discovered in the white chalk of England. Smmm Eschara distieha. a. Natural size. b. Portion magnified. 'White chalk. Fie. 317. Fig. 318.

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