C. colpoda, diagram of conjugation, [149];

nuclear relations in conjugation, [151]

Colpoda, [137];

C. cucullus, [153];

brood-fission in cyst, [147]

Columella, [370], [385]

Columnals, [619] (= Stem-ossicles, q.v.)

Columnaria, [344]

Comatula = Antedon, q.v.

Comatulidae, [594]