SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE, VOL. xxxiu. 



PLATE 7. 



FIG. 7. 



FIG. 3. 



FIG. 10. 



FIG. 4. 



FIG. i. 



FIG. 8. 



FIG. 2. 



FIG. 9. 



FIG. 5. FIG. 6. 



BALJENOPTERA PHYSALUS (L.), B. MUSCULUS (L.), AND B. VELIFERA COPE (?). 



Fig. t.S. physalits, Cape Cod, Mass., No. 16039 U. S. N. M. Figs. 2 and 4. Ditto, No. 16045 U. S. N. M. Fig. 3. B. --elifera (?), California. 



Figs- 5, 9- IO - B. muscu/us, Newfoundland. Figs. 6-8. Ditto, Ocean City, N. J. 



