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Plural of echinus.
References in periodicals archive ?
5(mu)m thick, echini 9(mu)m high, echini base 5(mu)m wide, echini apexes 25.
A report on the Echini of the warmer eastern Pacific based on the collections of the Velero III.
The paucity of Mollusks and also of Echini is most striking, although we brought up in one of the hauls numerous fragments of what must have been a gigantic species of Cystechinus, which I hope I may reconstruct.