dilated in Chauna, [109] n.;
enlarged or with "labyrinth" in Anatidae, [113];
looped in Anseranas, [113];
in Cracidae, [195];
in Rhynchaea, [292];
in Tantalus ibis, [96];
in Tetrao urogallus and Guttera, [200];
penetrates keel of sternum in certain Swans, [112];
in Cranes, [252];
use and formation, [13]