from The Century Dictionary and Cyclopedia
- n. A genus of merostomatous Crustacea of the family Eurypteridæ, which often exceed one meter in length, and are characterized by their relatively small cephalothorax with large eyes and central ocelli, and their chelicerate preoral and five pairs of postoral appendages, of which the first bears pincers and the last two are greatly elongated, extending almost to the end of the long telson. The genus has been found in the Silurian and Devonian of Scotland and New York, and in the Catskill formation of New York and Pennsylvania.
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