220 



HALIAETUS. SEA-EAGLE. 



and it is curious to observe how in this genus, as in the 

 Ospreys, the intestine becomes elongated and attenuated, like 

 that of the ichthyophagous Ferae. The singular curvature of 

 the duodenum, Plate XX, Fig. 1, ?', w^hich I have found in 

 the White-headed Sea-Eagle of America, as well as in our 

 own, affords a character by which the genus Haliaetus is dis- 

 tinguished from Aquila, which moreover has a very different 

 physiognomy, and is intimately allied to Buteo. 



The accompanying figure represents the foot of Haliaetus 

 Albicilla, and may be compared with that of Aquila Chrysaetus, 

 given in p. 203, when it will be seen that the two genera are 

 as well distinguished by their feet as by the form of the bill. 



