cystidea
Cys*tid"e*a (ss-td"-), n. pl. Etym: [NL., fr. Gr. (Zoöl.) Defn: An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.
Cys*tid"e*a (ss-td"-), n. pl. Etym: [NL., fr. Gr. (Zoöl.) Defn: An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.