Challengeridae (a family of Phaeogromia, [79]);

shells, skeleton of, [84], [85]

Chambered organ, of Antedon rosacea, [584];

of Pentacrinidae, [592]

Chambers, of Foraminiferal shell, [62]

Chapman, on Foraminifera, [58] n., [70]

Charistephane, [417]

Charybdea, [311], [314], [319];

C. xaymacana, [310], [319];

C. marsupialis, [319];