British species, [110]

Drilophagidae, [224]

Drilophagus, [204], [210], [212], [224], [227]

Dugès, on Planarians, [6], [10];

on Oligochaeta, [368]

Dujardin, on Rotifers, [198];

on Gastrotricha, [231];

on Kinorhyncha, [236]

Duplicature, [499], [500]

Duthiersia, [91]