174 PETREL. 



4 —GREY PETREL. 



Procellaria grisea, Ind. Orn. ii. 821. Gm.Lin.i. 564. 

 Gre)' Petrel, Gen. Syn. vi. 399. Cook's Voy. i. 258. 



LENGTH fourteen or fifteen inches. Bill two inches, brown ; 

 the general plumage black or sooty ; under wing coverts white, with 

 black shafts ; the quills exceed the tail in length : fore part of the 

 legs greenish blue. It varies in having the chin and throat whitish. 



Inhabits the Southern Hemisphere, from 35 to 50 degrees : seems 

 allied to the last. 



5— GLACIAL PETREL. 



Procellaria gelida, Ind. Orn. ii. 822. Gm. Lin. i. 564. 

 Glacial Petrel, Gen. Syn. vi. 399. 



LENGTH nineteen inches. Bill one inch and three quarters, 

 yellow; the tube over the nostrils, top of the upper mandible, the 

 end of the lower, and edges of both, black ; top of the head, taking 

 in the eyes, the neck behind to the shoulders, pale, bluish ash- 

 colour; the rest of the parts above dusky black ; chin, fore part of 

 the neck and breast, white ; from thence to the vent pale ash ; wings 

 and tail even ; legs and webs blue ; claws black ; sole of the foot 

 white. — Inhabits the Antarctic Circle, chiefly among the ice. 



7.— FULIGINOUS PETREL. 



Procellaria alba, Ind. Orn. ii. 822. 6. /3. 



Norfolk-Island Petrel, . Phill. Voy. pi. p. 161. 



Fuliginous Petrel, White's Journ. pi. p. 252. Gen. Syn. Sup. 2d. 334. 



LENGTH sixteen inches. Bill one inch and a half long, black, 

 and very much hooked at the end ; the head as far as the eyes, and 



