quadrate bone, [26];

teeth, [12];

vertebrae, [6], [25];

I. dispar, [48];

I. victor, [48]

Ichthyornithes, [25], [48] f.

Ichthyornithidae, structure, etc., [48] f.

Icteria, [573]

Icteridae, [542], [559], [579] f.;

habits, [580];