Histioderma, [302]

Histriobdella, [242] n.

Histriodrilus, [242] n.

Holloway, on Rotifers, [227]

Holomyarii, [137]

Holostomatidae, [63], [64], [73]

Holostomum, [73];

H. excavatum, [63]

Holothurian, as host, [298]

Homalogaster, [73]