The cystoid reaches its climax, but there appear now two higher types of echinoderms,—the crinoid and the starfish.
Applied to the cup-shaped body of a crinoid (Echinodermata).
The ossicles, or plates which cover the dorsal surface, are free, making the crinoid an animal of innumerable joints.
This subkingdom comprises at present such familiar forms as the crinoid, the starfish, and the sea urchin.
Fishes, Mollusca, and Crustacea silently ploughed their way in the depths of the sea, and the immovable crinoid lived there.
The clay came into notice late in the 18th century on account of the local abundance of the crinoid Apiocrinus Parkinsoni.
Any of various marine echinoderms of the class Crinoidea. Crinoids have a cup-shaped body with five or more feathery arms and sometimes a stalk for attachment to a surface. The arms contain reproductive organs and sensory tube feet. Crinoids were common during the Paleozoic Era and are important index fossils. Sea lilies and feather stars are types of crinoids.