of Echinodermata, [601] f.
Dextrin, [15]
Diadematidae, [531], [532], [538] f., [558]
Diadematoid type of ambulacral plate, [531], [539]
Dialytinae, [192]
Diancistra (a spicule resembling a stout sigma, but the inner margin of both hook and shaft thins out to a knife edge and is notched), [222]
Diaphorodon, [59];
shell of, [60]
Diaseris, [404];
asexual reproduction, [388]