310 ANATHLE. 



seas. On our late voyages comparatively few were ob- 

 tained, although seen in very great numbers. They do 

 not retire far to the south during the winter, but assemble 

 in large flocks ; the males by themselves, and the females, 

 with their young brood, are often met with in the Atlantic 

 Ocean, far distant from any land, where the numerous 

 crustaceous and other marine animals afford them abun- 

 dance of food." 



The adult male has the beak reddish-orange, bounded 

 with a black line ; the irides yellow ; cheeks white, tinged 

 with green ; top of the head and the occiput bluish-grey ; 

 lower part of neck behind, the upper part of the back, and 

 the scapulars white ; lower part of the back, the rump, 

 and upper tail-coverts black ; the point of the wing black ; 

 wing-coverts white; all the wing and tail-feathers nearly 

 black ; the primaries tinged with red on the inner web ; 

 the ends of the elongated scapulars and tertials fall in curves 

 over the wings ; under the chin a streak of black ; front of 

 neck and breast white, the latter tinged with buff; the 

 lower part of the breast, the belly, and all the under 

 surface black, except a patch on the flank, which is white ; 

 legs, toes, and membranes orange-red. 



The whole length twenty-four inches. From the carpal 

 joint to the end of the longest quill-feather eleven inches 

 and a half. 



The female has the beak greenish-brown, and the whole 

 of the plumage of two shades of brown ; the darker colour 

 occupying the centre of each feather ; the brown on the 

 head and neck rather lighter in colour, than the other 

 parts of the body. 



Young males at first resemble the females ; at a later 

 period one described by Dr. Richardson had the head and 

 neck dusky yellowish-grey, crowded with black spots ; 



