Rhea, [30] f.;

breast-bone, [7];

feathers, [32];

fossil, [31];

R. americana, [30] f., [31];

R. darwini, [30] f.;

R. macrorhyncha, [30]

Rheae, [26], [30] f., [38]

Rhectes, [531], [532]

Rheidae, structure, etc., [30] f.