2,55 



FORK-TAIL PRION f 



(Pacliyptila ? furcata.) 



Pa.? argent eo-grisea, gula 'pallida^ crisso albo, 7'emigihus caudaque 

 forficata 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. GmcL Si/st. Nat. 1, 561. Lath. hid. Orn. 

 2, 825. 



Fork-tail Petrel. Peyin. Arct. Zool. 2. 463. Lath. Gen. Si/n. 

 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. 



