structure of vanes, [4]

Pristorhamphus, [570]

Procellaria, [62], [67] f.;

P. pelagica, [67], [68];

P. tethys, [68]

Procellariidae, [59] f.;

habits, [61] f.

Procellariiformes, [59] f., [70]

Procellariinae, [59], [60], [65] f.

Procelsterna, [311]