from The Century Dictionary and Cyclopedia

  • n. A genus of fossil ostra-code crustaceans, of the family Leperditiidæ, characterized by oblong unequal valves with straight dorsal edge and rounded ventral outline, overlappingventral edge of the right valve, eye-tubercle, and subcentral interior muscular imprint. The genus extends from the Lower Silurian to the Carboniferous.


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