PLATE VI. 



Osteology of Penguins. 



(All the figures are of the natural size, except figs. 11 and 12, which are reduced to 



one-half of the natural size.) 



Fig. 1. — Lower surface of sternum of Eudyptes chnjsocome, from Tristan d'Acunha ; 

 natural size. 



Fig. 2. — Lateral view of sternum of Eudyptes chrysocome, from Tristan d'Acunha 

 natural size. 



Fig. 3. — Anterior border of sternal keel of Eudyptes chrysocome, from the Falklands. 



Fig. 4.— Anterior border of sternal keel of Spheniscus demersus. 



Fig. 5. — Anterior border of sternal keel of Pygosceles tceniatus. 



Fig. 6. — Anterior border of sternal keel of Aptenodytes longirostris. 



Fig. 7. — Costal process of sternum of Eudyptes chrysocome, from the Falklands. 



Fig. 8. — Costal process of sternum of Splieniscus demersus. 



Fig. 9. — Costal process of sternum of Pygosceles tceniatus. 



Fig. 10. — Costal process of sternum of Aptenodytes longirostHs. 



Fig. 11. — Posterior portion of sternum of Eudyptes chrysocome, from the Falklands; 

 half the natural size. 



Fio-. 12.— Posterior portion of sternum of Pygosceles tceniatus ; half the natural size. 



Fig. 13. — Uhiar carpal Iwne ot Eudyptes chrysocome, from Tristan d'Acunha. 



Fis;. 14. — Ulnar carpal bone of Spheniscus demersus. 



Fig. 15. — Ulnar carpal bone oi Aptenodytes longirostris. 



