2,55 



FORK-TAIL PRION ? 



J (Pachyptila ? furcata.) 



Pa.? argenteo-grisea, gula pallida, crisso albo, remigibus cauddque 



forjicata nigricantibus, rectrice extima extus alba. 

 Silvery-grey Prion ? with the throat pale, the vent white, the 



quills and forked tail dusky, the exterior tail-feather white on 



the outside. 

 Procellaria furcata. Gmel. Syst. Nat. 1. 561. Lath. Ind. Orn. 



2. 825. 

 Fork-tail Petrel. Penn. Arct. Zool. 2. 463. Lath. Gen. Syn. 



6. 410. Lath. Gen. Hist. x. 188. 



This is a northern species, and was first met with 

 on the ice between Asia and America. It is in length 

 ten inches : its beak is black and much hooked : the 

 prevailing colour of the plumage is a dark silvery 

 grey, with the under parts palest : the forehead and 

 crown are varied with brown : the quills are dusky- 

 grey ; the secondaries are paler grey on their edges : 

 the inner ridge of the wing is dusky black : the chin 

 is pale grey ; the vent white : the tail is forked and 

 coloured similarly to the quills, with its outer fea- 

 thers, on each side, white on its exterior web : the 

 legs are black. 



