Ctenoplana, [416], [421]

Ctenoplanidae, [421]

Cubomedusae, [310], [316], [318] f.

Cucumaria, [573];

C. crocea, [573], [602];

C. laevigata, [602]

Cuénot, on Sporozoa, [94];

on reproduction of Monocystis, [96] n.

Culcita, [453], [472];

C. tetragona, [453]