Fabricia, [339];

eyes, [272];

otocyst, [273]

Faecal groove, of Sabellids, [337]

Fans, of Chaetopterus, [295], [324]

Faraday, on asexual reproduction of Planariae, [6], [40] n.

Farre, on Polyzoa, [500], [508]

Farrella, [500], [518], [533]

Fasciola, [67]

Fecampia, life-history, [45]