Fossil wood with _Teredo antenautæ_ is also met with, and pyritous casts of univalve and bivalve shells. [Please select]
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Shell univalve, turbinated, inversely conic, convolute; aperture longitudinal, narrow, not toothed; base effuse; spire very short. [Please select]
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If present, is it univalve or bivalve; if absent, what other means of protection has been developed to take its place. [Please select]
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Shell univalve, greatly depressed, broad, ear-shaped, the disk with many perforations. [Please select]
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Indeed I have heard more than once that the famous "Pâte de Guimauve" owes its healing nutritive character to this despised univalve, which is said to enter largely into its composition. [Please select]
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