iGo. 
dmacels eh 
Fic. 3. The North Atlantic Black Right-Whale (Balena glacialis). 
Fic. 4. The Blue Rorqual (Balenoptera sibbaldi). 
Fic. 5. The Humpback Whale (Aegaptera boips). 
Fig. 3 about ;4,, Fig. 4 45, Fig. 5 ;1, natural size. 
From models presented by the U.S. National Museum. 
[To face page 14, 
