BEAKED WHALES 



215 



relations of the palatines 

 and pterygoids differ 

 somewhat, and are made 

 use of to distinguish the 



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species HI. australis and 

 M. densirostris. 



The vertebral formulae 

 of several individuals are 

 as follows : - - M. grayi : 

 C. 7 ; D. 10 ; L. 1 1 ; Ca. 

 20 = 48. M. australis : 



C. 7 ; D. 9 ; L. 1 1 ; Ca. 

 20 = 47. M. bidens : C. 

 7 ; D. 10 ; L. 10 ; Ca. 

 19 = 46. Another indivi- 

 dual of M. bidens : C. 7 ; 



D. 10; L. 9; Ca. 20-46; 

 M. layardi : C. 7 ; D. 10 ; 

 L. 10; Ca. 19 = 46. There 

 are thus no specific char- 

 acters at all obvious to 

 be deduced from the 

 numbers of the vertebrae. 



In both M. aitstralis 

 and M. grayi the atlas and 

 axis alone were united, the 

 least amount of union 

 existing in any Ziphioid 

 whale ; and one of the 

 skeletons was that of an 

 adult animal. The same 



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