Gyrocotyle (= Amphiptyches), [91];
G. rugosa, [77];
G. urna, [77]
Gyrodactylidae, [53], [61], [73]
Gyrodactylinae, [73]
Gyrodactylus, [55], [61], [73]
Haberlandt, on Convoluta, [43]
Habits, of Platyhelminthes, [3], [7], [21], [35], [43];
of Nemertinea, [114];
of Gordiidae, [170] f.;