186 PETREL. 



dusky specks; breast and belly hoary ash-colour ; top of the head, 

 and all the upper parts of the plumage, wings, and tail dusky black, 

 inclining to hoary on the back ; tail rounded at the end ; wings and 

 tail even ; legs very pale ; webs for one-third the same, the rest to 

 the end black ; joints of the toes black. 



Said to inhabit North America. — Leverian Museum. One of 

 these, supposed to bean adult bird, had the forehead, sides under the 

 eyes, and all beneath from chin to vent white, but the under tail 

 coverts were dusky. 



16.— WHITE-BREASTED PETREL. 



Procellaria alba, Ind. Orn. ii. 822. Gm. Lin. i. 5G5. 

 White-breasted Petrel, Gen. Syn. vi. 400. 



LENGTH sixteen inches. Bill one inch and a half, very hooked 

 at the tip, and black on the top ; before the nostrils much indented, 

 and the tube containing them very prominent; head, neck, and upper 

 parts of the body dusky brown, nearly black ; on the throat a whitish 

 patch; breast, belly, and vent, white; under tail coverts cinereous 

 and white mixed ; tail rounded at the end, and the wings somewhat 

 exceed it in length ; legs black brown, fore part of the toes halfway 

 black, the outside of the exterior the same the whole of its length ; 

 webs black; the spur behind blunt. 



Inhabits Turtle and Christmas Isles in the South Seas. — From 

 the drawings of Sir Joseph Banks. This and the last seem to be 

 allied. 



17.— SNOWY PETREL. 



Procellaria nivea, Ind. Orn. ii. 825. Gm. Lin. i. 562. 



Le Petrel blanc, ou Petrel de neige, Buf. ix. 314. 



Snowy Petrel, Gen. Syn. vi. 408. Forst. Voy. i. p. 90. Cook's Voy. i. p. 33. 



LENGTH twelve inches. Bill one inch and a quarter long, 

 black, inclining to blue at the base ; the tube containing the nostrils 



