251 



forster's prion. 



(Pachyptila Forsteri.) 



Pa. ccerulescens subtus alba, remigibus rectricibus apice Jasciaque 



alarum expansarum Jusco-nigris. 

 Blue Prion beneath white, with the quills, tail-feathers, at the 



tip, and band on the expanded wings, brown-black. 

 Procellaria vittata. Gmel. Syst.Nat. 1. 560. Lath. Ind. Orn., 



2. 827. 

 Le Petrel Bleu. Buff. Hist. Nat. Ois. 9. 31G. 

 Vittated Petrel. Forst. Voyage, 1. 153. 

 Blue Petrel. Cook's Voyage, I. p. 29. 

 Broad-billed Petrel. Lath. Gen. Syn. 6. 414. Lath. Gen. Hist. 



x. 195. 



In length twelve inches : its beak is blue-grey, an 

 inch and a quarter in length, and nearly an inch 

 broad at the base ; both mandibles are bent at the 

 point, and have their edges slightly notched : the 

 nostrils are placed in a very short tube : the pre- 

 vailing colours of the plumage are bluish-ash on the 

 upper parts of the body, with some of the feathers 

 brown in the middle, and white on the sides of the 

 head and under parts : beneath the eye is a dusky- 

 black streak : the quills and the tips of the six middle 

 tail-feathers are deep dusky black : the legs are black. 

 The female has the beak somewhat more slender. 

 Both sexes possess, when the wings are expanded, a 

 dark band from the tip of one wing to that of the 

 other, which crosses the back. And also (according 

 to Forster) an amazing thick plumage, having two 



