reproduction, [501], [506];

development, [509];

affinities, [461], [509], [510];

metamorphosis, [512];

budding, [514];

distribution, [493], [504], [519];

palaeontology, [520];

terminology, [523];

determination of British genera, [505], [521], [525]

Pomatoceros, habitat, [300], [340]