PLATE XLVII. 



Balcenoptera borcalis. 



Fig. 1. Deep muscles of thorax and abdomen, dorsal musculature. J X natural size. 

 Fig. 2. Situs viscerum, and hypaxial muscle of pedicle, f X natural size. 



1. M. semispinalis capitis. 



2. M. longissimus dorsi. 



3. M. iliocostalis. 



4. M. splenius. 



5. M. trachelo-mastoideus. 



6. M. transversarius. 



7. M. levator anguli scapula. 



8. M. sternomastoideus and mastohumeralis. 



9. M. scalenus. 



10. M. transversalis abdominis. 



11. M. rectus. 



12. M. coccygeus. 



13. M. temporalis. 



14. M. masseter, pars superficialis. 



15. M. masseter, pars profunda. 



16. M. depressor mandibulse. 



17. Hypaxial muscle of pedicle, superficial portion. 



18. The same, lateral portion. 



19. The same, mesal portion. 



20. Thymus. 



21. Pulmonary artery. 



22. Left atrium. 



23. Left ventricle. 



24. Lung. 



25. Liver. 



26. Falciform ligament. 



27. Omentum. 



28. Stomach, second compartment. 



29. Small intestines. 



30. Rib XIII. 



31. Kidney. 



32. Ovary. 



33. Ureter. 



34. Bladder. 



35. Urethra. 



36. Vagina. 



37. Rectum. 



38. Umbilical artery. 



39. Colon. 



40. Diaphragm. 



41. First thoracic rib. 



42. Cervical rib fused with the foregoing. 



43. M. sternothyroideus. 



44. M. thyrohyoideus. 



