of Holothuria nigra, [566];

of Antedon rosacea, [584], [585]

Coeloplana, [412], [422];

C. mitsukurii, [422]

Coeloplanidae, [422]

Coenocyte, [30]

Coenograptus, [282]

Coenopsammia, [404]

Coenosteum, [371], [387]

Coenothecalia, [344]