PLATE XII. 



Viscera op Penguins. 



Fig. 1. — Upper surface of brain of A2)tenodytes longirostris ; natural size. 



Fig. 2. — Upper surface of brain of Eudyptes chrysocome ; natural size. 



Fig. 3. — Upper surface of brain of Splieniscus demersus ; natural size. 



Fig. 4. — Interior of stomach of Sjyheniscv.'i minor; natural size. D. Duodenum. 

 M. S. Muscular portion of stomach. (E. (Esophagus. P. G. Proventricular 

 gland. 



Fig. 5. — ^]Aefi\\ oi Spheniscus minor ; natural size. 



Fig. 6. — Lung of Eudyptes chrysocome, showing the foramina by means of which the 

 air sacs communicate with the luno;. 



Fie. 7. — Diaofram to show communications of the renal veins. 



C. C. Crural veins, each dividing into four branches — 1, 2, 3, 4. 



H. Hypogastric veins. 



C. M. Coccygo-mesenteric vein forming the commencement of the vena 



portse. 

 V. C. I. Vena cava inferior. 



Fig. 8. — Diagram of arterial system of Eitdyptes chrysocome. 



1. Aorta. 2. Innominate artery. 3. Subclavian artery. 4. Vertebral artery. 

 5. Internal mammary artery. 6. Thoracic artery. 7. Brachial artery. 

 8. Common carotid artery. 9. Subcutaneous cervical artery. 10. Anas- 

 tomotic artery. 11. OEsophageal artery. 12. Lingual artery. 13 

 Bronchial artery. 14. Intercostal arteries. 15. Coeliac axis. 16. Splenic 

 arteries. 17. Anterior gastric artery, 18. Hepatic arteries. 19. Posterior 

 gastric artery. 20. Intestinal artery. 21. Superior mesenteric artery. 

 22. Renal arteries. 23. Lumbar arteries. 24. Crural artery. 2.5. Pelvic- 

 branch of crural artery. 26. Inferior mesenteric artery. 27. Hypo- 

 gastric artery. 28. Middle sacral artery. 



