dorsal tubercle, [52];

nervous system, [53];

sense-organs, [53];

alimentary canal, [54];

renal organ, [54];

reproductive organs, [55];

embryology and life-history, [55], [57], [60];

metamorphosis, [61];

A. challengeri, dorsal tubercle, [79];

A. mentula, structure, [39] f., [40];