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Restoration of under side of a trilobite

Restoration of under side of a trilobite.jpg Peripatus novæ zealandiæThumbnailsPrehistoric carving of the MammothPeripatus novæ zealandiæThumbnailsPrehistoric carving of the MammothPeripatus novæ zealandiæThumbnailsPrehistoric carving of the Mammoth

Restoration of under side of a trilobite (Triarthrus becki), the trunk limbs bearing small triangular respiratory lobes or gills.—After Beecher.