Holectypus inflatus, [324].
Holloway, [882].
Holmes, Mr., researches of, [702].
Holoptychius, [618].
Holothuriadæ, [280].
Homalonotus delphinocephalus, [536].
Homœosolen ramulosus, [268], [271].
Honfleur, [680].
Hooker, Dr. J., on Arctic Diatomaceæ, [89].
-------------- on Lepidodendron, [139].