PLATE XXXIII 



Fig. I. Fin whale, <?, No. 320 (?). Ventral view. Showing heavy pig- 

 mentation in the tail region. 



Fig. 2. Fin whale, $, No. 263. Ventral view. Showing tongues of pig- 

 ment behind anus. 



Fig. 3. Fin whale, ?, No. 260. Ventral view. Also showing tongues of 

 pigment behind anus. 



