anatomy, [430]

Hallez, on Turbellaria, [7], [21], [40]

Halosydna, [298]

Hamann, on Nematoda, [131], [133], [136] n.;

on Acanthocephala, [176], [180]

Hamingia, [435] f., [442];

males of, [438]

Haplobranchus, [339];

gills, [261]

Haplodiscus, [43], [49]