Johnston, on Hirudinea, [393]

Joliet, on development of Rotifers, [218];

on Polyzoa, [508]

Jungermanniaceae, inhabited by Rotifers, [227]

Jurassic, Serpulids, [301];

Polyzoa, [520] f.

Kaiser, on Acanthocephala, [177]

Kamptoderm, [469], [470]

Keferstein, on Polycladida, [7], [10]

Kennel, von, on Nemertinea, [108];