Crepina, [450]
Cretaceous, Polyzoa, [520], [521]
Cribrilina, [518], [524], [528]
Crinoids, as hosts, [341]
Criodrilus, [358], [366], [386]
Crisia, [471], [478], [479], [480], [507], [518], [531]
Crisiidae, [517]
Crisp, on Parasites, [164]
Cristatella, [494] f., [495], [499], [501], [503]-505, [512], [518];
attacked by Planarians, [486];