PLATE XXXIII 



Fig. I. Fin whale blowing leisurely, with blowhole, dorsal fin, and 

 dorsal edge of the caudal peduncle visible above the surface. The 

 appearance of the peduncle suggests that the body is exceptionally 

 horizontal. (See Fig. 1 6 in the text.) 



Fig. 2. Fin whale blowing fairly leisurely, with blowhole and dorsal fin 

 both visible. The 'spout' is just visible above the back, and the 

 head has moved forward (to the right) during inspiration. (See 

 Fig. I b in the text.) 



Fig. 3. Fin whale blowing at medium speed. The whale is moving away 

 from the observer, and the open blowhole can be seen. (See Fig. 1/ 

 in the text.) 



Fig. 4. Fin whale blowing at medium speed. The back is flexed and the 

 blowhole now submerged. (See Fig. ig in the text.) 



Fig. 5. Fin whale blowing at high speed. (See Fig. i« in the text.) 



Fig. 6. View of Fin whale from the rear, to show height of dorsal edge 

 of caudal peduncle. The whale is lying on its left side. The plane 

 of the flukes is more nearly in line with the ventral than with the 

 dorsal edge of the peduncle. The outer parts of the flukes have 

 been cut off. (See Fig. 76 in the text.) 



