PLATE XLIV. 



Balasnoptera borealis. 



Fig. 1. Dissection of musculature of ventral pouch and the sterno-manclibularis. f natural size. 

 Fig. 2. Superficial muscles of face, hyoid musculature, muscles of flipper, of neck and of intermandibular region. 

 The panniculus carnosus and the muscles of the ventral pouch have been removed, f natural size. 



1. Ventral division of the panniculus reflected. 16. 



2. M. mylohyoideus reflected. 17. 



3. Longitudinal layer of ventral pouch partially reflected. 18. 



4. Cavum ventrale. 19. 



5. M. sternomandibularis. 20. 



6. M. pectoralis. 21. 



7. M. latissimus dorsi. 22. 



8. M. teres major. 23. 



9. M. infraspinatus. 24. 



10. M. deltoideus. 25. 



11. M. trapezius. 26. 



12. M. masto-humeralis. 27. 



13. M. sterno-mastoideus. 28. 



14. M. splenius. 29. 



15. M. trachelo-mastoideus. 



M. occipito-frontalis. 



M. orbicularis palpebrarum. 



Superficial layer of transverse rostral muscle. 



M. masseter. 



M. depressor mandibulse. 



M. geniohyoglossus. 



M. hyoglossus. 



M. omohyoideus. 



M. sternohyoideus. 



M. rhomboideus. 



M. triceps. 



M. extensor communis digitorum. 



M. flexor carpi ulnaris. 



M. obliquus externus. 



