of Polyzoa, [506], [507]

Ehrenberg, on Turbellaria, [3], [6];

on Rotifers, [198], [220] n., [228];

on Gastrotricha, [231];

on Polyzoa (Bryozoa), [475]

Eichhorn, on Rotifers, [197]

Eisen, on Oligochaeta, [380], [390]

Eisig, on Capitellidae, [373];

on Bonellia, [443]

Electra, [481], [518], [523], [530];