of Vorticellidæ, [158]
Cycloseridae, [404]
Cydippidea, [417]
Cydippiform stage of Lobata and Cestoidea, [414]
Cydonium milleri, [222]
Cymbonectes, [306]
Cymbonectinae, [306]
Cyphoderia, [52]
Cyrtoidea, [79]
Cyst (a closed membrane distinct from the cytoplasm around a resting-cell or apocyte), [37], [39];