The Cambridge natural history, Vol. 02 (of 10)

by Frank E. Beddard; W. B. Benham; F. W. Gamble; Marcus Hartog; Lilian Sheldon

of Müller's larva, [29];

of Land Planarians, [33];

of Planaria lactea, [35];

of Temnocephala, [53];

of Trematode-larvae, [3], [59], [60], [65];

of Cestode-larvae, [87];

absent in certain groups, [124], [396];

of Rotifers, [202] f.;

of Archiannelida, [243], [244];

of Echiuroidea, [434];