paleocrinoidea

from The Collaborative International Dictionary of English v.0.48

Paleocrinoidea \Pa`le*o*cri*noi"de*a\, n. pl. [NL. See {Paleo-},
   and {Crinoidea}.] (Zool.)
   A suborder of {Crinoidea} found chiefly in the Paleozoic
   rocks.
   [1913 Webster]