Hibernaculum, [501], [502]

Hincks, on Polyzoa, [475], [500], [508], [516], [519], [523]

Hippothoa, [528]

Hippuraria, [533]

Hirudinea, [241], [392] f.;

external characters, [392];

British species, [393];

eyes, [395];

branchiae, [395];

alimentary canal, [396];