NO. 1875 NEW FOSSIL CETACEAN — TRUE 455 



like that of Physeter, or of a whalebone whale, especially as regards 

 the transverse processes, of which there is but a single broad and 

 thick one situated very high up on either side. According to Van 

 Beneden, it was found in the shell-marl of Salles, while the type- 

 beak of Squalodon, with which it was associated, was found at 

 Liognan. Johann Miiller also mentioned this atlas in 1849, remark- 

 ing that Grateloup had written to him that it probably belonged to 

 Squalodon} If this association be correct, which seems somewhat 

 doubtful, the atlas and (by inference) the axis of Squalodon are 

 very different from those of Prosqualodon. Additional information 

 regarding the vertebras of the different species of Squalodon is very 

 much to be desired. 



^ Die Zeuglodonten von Nord Amerlka, 1849, p. 29. 



