Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
24. 
25. 
26. 
27. 
28. 
29. 
30. 
dl. 
od. 
398 
Side view of bronchial ring? of the same species. 
Tracheal rings of Dinornis ingens (?): a, full view; 5, front view; ¢, back view. 
Inside view of a tracheal ring of Dinornis elephantopus (*). 
Broad variety of tracheal rings of Dinornis ingens (*). 
Narrow variety of tracheal rings of Dinornis ingens (?). 
Two partially united tracheal rings of Dinornis ingens (?). 
Two partially united tracheal rings of Dinornis ingens (?), simulating a spiral. 
Two partially united tracheal rings of Dinornis ingens (?), simulating a spiral. 
Tracheal rings of Dinornis robustus (2): a, full view ; 6, back view ; ¢, front view. 
Narrow variety of tracheal rings of Dinornis robustus (?). 
Broad variety of tracheal rings of Dinornis robustus (?). 
Two partially confluent rings of Dinornis robustus (?): a, smooth united part ; 
Xx, rough anchylosed part. 
Two confluent rings of the broad variety of Dinornis robustus (*). 
Two partially confluent rings of Dinornis robustus (*). 
Inside view of two confluent rings of Dinornis robustus (?). 
Longitudinal section, showing inner surface of two confluent rings of Dinornis 
ingens (2). 
Longitudinal section of a tracheal ring of Dinornis robustus (*). 

