2ijj|ïtW^^^ Fin 



Whale 



Bottlenose Whale 



— / Sperm Whale 



Killer 



Common Dolphin 



Guinea Pis. 



Figure 6y. The skeletons of a number of Cetaceans and a Guinea Pig, showing differences 

 in length of the various parts of the vertebral column and in the direction of the spinous 



processes. {Slijper, 1946.) 



