CLASSIFICATION 99 



The absence or feeble development of the coronary 

 process of the lower jaw. 



In the Fore Limb and Girdle. The absence of 

 clavicle. 



The Greater lenp-th of the radius and the ulna than 



o o 



the humerus. 



The frequent presence of the typical number of 

 bones in wrist. 



The long and simple lungs. 



The unlobulated liver and complex stomach. 



The extraordinarily shortened, but much convoluted, 

 brain. 



This combination of characters is found nowhere 

 else among the mammals, and, indeed, the bulk of 

 the peculiarities are confined to the whales. I might 

 also perhaps have added some few others, and cer- 

 tainly more than one characteristic feature might 

 have been included in the list, had I not limited 

 myself to those which occur both in whalebone and 

 in toothed whales. As there is some idea to the 

 effect that the two great divisions of the Cetacea 

 have had a separate descent, even from unlike ances- 

 tors, this had, however, better be deferred until after 

 we have seen what can be done with the broader 

 facts in settling the affinities of this highly puzzling 

 group of creatures. 



It is to be feared that nothing can be done except, 

 and that vaguely, to suggest an Ungulate - like 

 ancestor. In them we have in some forms, at 

 least the Ruminants, a highly complex stomach and 

 a rather simple liver. But there is really nothing 



