Scales, nature of, [2] n.

Scaniornis, fossil, [108]

Scapula, [7], [8], [8];

unites with coracoids in Fregata, [72]

Scapulars, [20], [22]

Scapus, [3]

Scardafella, [335], [340] f.;

S. inca, [341];

S. squamosa, [341]

Scaup, [121]