H. pellucidus, [465]
Hymeniacidon, [224]
Hymeraphia, [223]
Hyocrinidae, [590]
Hyocrinus, [588], [589], [590], [590];
H. bethellianus, [590]
Hyperia (Amphipod), parasitic in Radiolaria, [87]
Hyphalaster, [471];
H. moseri, [459]
Hypnocyst, of Rhizopoda, [57];