254 AMERICAN PRION. 



hoary blue : the sides of the head, above the eye, and 

 all the under parts, white : beneath the eye a trace 

 of bluish-ash colour : the tail very slightly forked : 

 the legs black, with a yellowish mark in the middle 

 of each web. 



Found in the Southern Ocean, in latitude 27 de- 

 grees. 



AMERICAN PRION. 



(Pachyptila Fregatta.) 



Pa. nigra sublus alba, pedibus nigris. 



Black Prion beneath white, with the legs black. 



Procellaria Fregatta. Linn. Syst. Nat. 1. 252. Gmel. Syst. 



Nat. 1. 561. Lath. Inch Orn. 2. 826. 

 Hirunclo Americana. Rochef.Antill.pl. 152. 

 American Petrel. Lath. Gen. Hist. x. 189. 



This species is said to be rather less than the 

 Common Petrel, and to be black above and white 

 beneath, with black legs. 



It inhabits the ocean. 



