PROFESSOR OWEN ON THE GENUS DINORNIS. 377 



Fig. 7. Under surface of calvarium, showing the cerebral and olfactory cavities, of / 

 Palapteryx gerano'ides. 

 8, 9 & 10. Views of the os tympanicum of the Dinornis casuarinvs (p. 356). 



1 1 . Side view of the upper mandible of a species of Nestor. 



12. Upper view of ditto. 



n, the nostril. 



22, the groove behind the upper end of the premaxillary part of the 



mandible. 



13. Under view of ditto. 



14. 15 & 16. Corresponding views of the upper mandible of a living species of 



Nestor [N. hypopolius). 



PLATE LIV. Palapteryx. 



Fig. 1. Side view of the skull, with lost parts restored in outline, of the Palapteryx 

 gerano'ides ? 



2. Upper view of ditto. 



3. Under view of ditto. 



4. Back view of ditto. 



5. Back view of the extremity of the upper beak. 



6. Under view of the portion of lower jaw. 



7. Upper view of ditto. 



8. Outline of head o( Dinornis as conjecturally restored in 1843 (see pi. 30). 



9. Outline of cranium of Dinornis reduced to the same proportions. 



PLATE LV. Palapteryx. 



Fig. 1 . Side view of the cranium of a Palapteryx. 



2. Back view of ditto. 



3. Under view of ditto. 



4. Side view of the cranium of a different and larger species of Palapteryx. 



5. Under view of ditto. 



6. Upper view of a mutilated cranium of apparently the same species, indicating 



the form and proportions of the cerebrum and cerebellum. 



PLATE LVL NoTORNis Mantelli. 



Fig. 1. Side view of the skull oi Porpliyrio Sultana. 



2. Upper view of ditto. 



3. Under view of ditto. 



VOL. III. — PART v. 3 F 



