Clypeaster humilis, Cake urchins' or 'sea biscuits', is a genus of echinoderms belonging to the family Clypeasteridae. Middle East. Dated 1918

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Keywords: 20th, archival, archive, biscuits, cake, century, clypeaster, clypeasteridae, east, echinoderms, genus, historical, history, humilis, life, marine, middle, sea, urchins