PLATE LII. 



Balcenoptera borealis. 



Fig. 1. Ventral view of stomach, duodenum and arch of colon. 2 X natural size. 



Fig. 2. Interior of stomach. 2 X natural size. 



Fig. 3. Dorsal view of preumbilical visceral complex. 2 X natural size. 



Fig. 4. Dorsal view of liver. 2 X natural size. 



1. (Esophagus. 



2. Stomach, compartment 1. 



3. Stomach, compartment 2. 



4. Stomach, compartment 3. 



5. Stomach, compartment 4. 



6. Duodenum, descending. 



7. Duodenum, transverse. 



8. Duodenum, ascending. 



9. Osecum. 



10. Colon. 



11. Ileum. 



12. Attachment of great omentum. 



13. Root of the mesentery. 



14. Superior mesenteric artery. 



15. Superior mesenteric vein. 



16. Postcava. 



17. Caval fissure. 



18. Portal vein. 



19. Hepatic artery. 



20. Gastric artery. 



21. Spleen. 



22. Pancreas. 



23. Diaphragmatic surface of the right lobe of liver. 



24. Spigelian lobe. 



25. Processus papillaris. 



26. Left coronary ligament. 



27. Falciform ligament. 



28. Umbilical veins. 



29. Renal impression. 



30. Duodenal area. 



31. Intestinal area. . 



32. Gastric area. 



