Echinid
"Echinid" in a Sentence (1 examples)
He concludes that Echinocystis is an echinid and not a cystid; and that Palæodiscus is an echinid and not an asterid.
He concludes that Echinocystis is an echinid and not a cystid; and that Palæodiscus is an echinid and not an asterid.