Echinopaedia is the name for the early or larval stages of echinoderms like sea stars and sea urchins. "A, common primitive form of Echinodermata, whence B, B', a vermiform holothurid, and C, C', a pluteiform ophiurid or echinid (pluteus) larva are derived: a, mouth; b, stomach; c, intestine; d, anus; e, ciliated band." -Whitney, 1911

Echinopaedia

Echinopaedia is the name for the early or larval stages of echinoderms like sea stars and sea urchins.…

"Eupsamma. A genus of perforate stone-corals, as E. brongniartiana (shown here), of the family Eupsammidae." -Whitney, 1911

Eupsamma

"Eupsamma. A genus of perforate stone-corals, as E. brongniartiana (shown here), of the family Eupsammidae."…

"Sea-urchin (Echinus esculentus). Left side in natural state; right side with spines removed, showing the bare plates." -Whitney, 1911

European Edible Sea Urchin

"Sea-urchin (Echinus esculentus). Left side in natural state; right side with spines removed, showing…

The wentletrap is a small, white, spiraled gastropod mollusk.

Wentletrap

The wentletrap is a small, white, spiraled gastropod mollusk.