Smithsonian Contributions to Knowledge, Vol. xxxim. 



Plate 7. 



Fig. 7. 



Fu;. 4. 



Fio. I, 



Fig. 3. 



Fic. 2. 



Fig. 10. 



Fig. 8. 



Fig. g. 



Fig. 6. 



BALMNOPTERA PHYSALUS (L.), B. MUSCULUS (L.), AND B. VELIFERA CoPE (?). 

 Fig. I.-/,.. f/,ysatus. Cape Cod, Mass.. No. 16039 U. S. N. M. Figs. 2 and 4.-/?'/'''. No. .6045 U. S. N. M. Fig. 3-5. >.'/</>« (?)• California. 



Fig.s. 5, 9. lO.-B. musculus, Newfoundland. Figs. b-%.-Dillo, Ocean City, N. J. 



