1) Class 2) Lily-shaped 3) Living fossil 4) Sea lily 1) Comatulid 
• (a.) Crinoidal. • (n.) One of the Crinoidea.
any marine invertebrate of the class Crinoidea (phylum Echinodermata) usually possessing a somewhat cup-shaped body and five or more feathery arms. ... [7 related articles]
Cri'noid (krī'noid) adjective [ See Crinoidea .] (Zoology) Crinoidal. -- noun One of the Crinoidea. 
(Gk: krinon lily; krinoides lily-shaped) a featherstar of the class Crinoidea; a suspension-feeding echinoderm with long, branching arms.
[adj] - of or relating to or belonging to the class Crinoidea 2. [n] - primitive echinoderms having five or more feathery arms radiating from a central disk
adjective of or relating to or belonging to the class Crinoidea
any echinoderm of the class Crinoidea, having a cup-shaped body to which are attached branched, radiating arms, comprising the sea lilies, feather stars, and various fossil forms.