a sa ca — mt, 
yp 
YA YOWUEW a 
oe N. > 
— WwW. 
— we __ i 
Fic.!1. Balenoptera musculus, see p. 3. Fic. 2. Neobalena marginata, see p. 4. 
Fig. 3. Hyperoodon rostratus, see p. 5. 
To face p, 4. 
