Ciocalypta, [225]
Cirripathes, [408];
C. spiralis, [408]
Cirrus, of Crinoidea, [430], [580];
of Antedon rosacea, [581], [585];
of Rhizocrinidae, [588], [590];
of Pentacrinidae, [588], [591], [592];
of Rhizocrinus, [591];
of Comatulidae, [594];
of Actinometra, [594];