Mer`o*stom"a*ta (?), n. pl. [NL., fr. Gr. thigh + , -, mouth.] Zool.

A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus.


© Webster 1913.

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