The Great Northern Diver 177 



the angle sloping gradually upwards to the point ; tomia 

 of both mandibles inflected ; head and neck black, glossed 

 with purplish green ; transverse bar upon the throat, 

 middle neck, collar, and sides of the upper part of the 

 breast, black, the feathers having raised white margins, 

 which give these parts a striated appearance ; the whole 

 of the upper plumage glossy black, each feather having 

 two pure white spots, one on eacn side of the shaft near the 

 tip, forming rows ; those upon the scapulars and tertials 

 large and quadrangular, but becoming small and nearly 

 round upon the lower part of the back and rump. Flanks 

 and sides black, spotted with white, the rest of the under 

 plumage white ; the long axillary feathers the same, with 

 a black stripe down their centres ; tail short and rounded, 

 consisting of twenty feathers ; legs greyish-black. 



M 



