The first Living Things

crinoids

Any of various echinoderms of the class Crinoidea, including the sea lilies and feather stars, that are characterized by a cup-shaped body, feathery radiating arms, and either a stalk or clawlike structure with which they are able to attach to a surface.

Jellyfish

any of various marine coelenterates of a soft, gelatinous structure, esp. one with an umbrellalike body and long, trailing tentacles; medusa.

Shell

any of various objects resembling such a covering, as in shape or in being more or less concave or hollow.

Sponges

A small absorbent contraceptive pad that contains a spermicide and is placed against the cervix of the uterus before sexual intercourse.

trilobites

Any of numerous extinct marine arthropods of the class Trilobita, of the Paleozoic Era, having a segmented body divided by grooves into three vertical lobes and found as fossils throughout the world.