PLATE XLIII. 



Balcmoptera borealis. 



Fig. 1. Superficial dissection exposing panniculus carnosus. f natural size. 



Fig. 2. Musculature of ventral pouch. Ventral division of panniculus has been reflected, f natural size. 



1. Ventral division of panniculus. 5. Longitudinal muscle of ventral pouch. 



2. Dorsal division of panniculus. 6. M. sternomandibularis. 

 3 Lateral raph6. 7. M. pectoralis. 



4. M. mylohyoideus. 



