272 PROFESSOR OWEN ON THE GENUS DINORNIS. 



PLATE XVIII a. 

 Dorsal vertebrae, natural size. 

 Fig. 1. Side view of an anterior dorsal vertebra, of apparently the same species of 

 Dinomis as that to which the cervical vertebra Fig. 4 in Plate XVIII. be- 

 longed : c, the costal articulation ; h, the strong inferior spinous process. 



2. Upper view of the same vertebra. 



3. Front view of the same vertebra. 



4. Front view of a corresponding dorsal vertebra in an Ostrich : h, the inferior 



spinous process. 

 .5. Front view of the thirteenth cervical vertebra in the Apteryx -. h, the inferior 

 spinous process. 



6. Side view of a middle dorsal vertebra of a smaller species of Dinomis {Din. 



dromeeoides ?) : c, the costal articulation. 



7. Upper view of the same vertebra. 



8. Front view of the same vertebra. 



9. Under view of the same vertebra. 



PLATE XIX. 



Front or under views of the Pelvis of three species of Dinornis and of the Ostrich, 

 all reduced to one-fourth the natural size. 



Fig. 1. Anterior sacral vertebrae oi Dinornis giganteus. 



2. Pelvis o{ Dinornis dromcBoides. 



3. Anterior portion of pelvis of Dinornis didiformis. 



4. Entire pelvis of the Ostrich {Struthio Camelus). 



The following letters indicate the same parts in each figure : — 



a. Anterior sacral vertebra, and its costal articular surfaces in figs. 2 & 3, 



b. Middle sacral vertebrae without inferior transverse processes. 



c. Os ilium. 



d. Os pubis. 



e. Os ischium. 



PLATE XX. 



Back and side views of Pelvis of aifferent species of Dinornis, one-fourth the 



natural size. 



Fig- 1. Right OS innominatum of Dmorm's jipianfeus. 

 2. Pelvis of Dinornis dromaoides. 



