96 FULIGULIN^. 



lateral sinuses very short and wide, the ridge broad and flat 

 at the base, the sides at the base rapidly sloping, the edges 

 soft, marginate, concealing the ends of the numerous, little 

 elevated lamellae, the unguis small, obovato-oblong, flattened 

 and decurved ; that of the lower mandible obovate, rather 

 small, and nearly flat ; legs very short ; tarsus compressed ; 

 hind toe very slender, -with a broad membrane ; outer toes 

 about equal, and double the length of the tarsus ; interdigital 

 membrane emarginate ; claws small, slender, rather pointed ; 

 wdngs short, convex, narrow, pointed, the first quill longest ; 

 tail very small, much rounded or cuneate, of fourteen stiifish, 

 tapering feathers. 



1. Fuligula Nyroca. Ferruginous Sccmp-Duck. Bill 

 dusky-blue ; head, neck, fore part of breast, and sides, chest- 

 nut-red ; the neck with an obscure brown ring ; upper parts 

 blackish-brown, glossed with green ; speculum white, with a 

 terminal black bar ; lower parts white. 



2. Fuligula Marila. Broad-billed ScaupDuck. Bill 

 light greyish-blue, with the unguis blackish ; head and upper- 

 neck greenish-black ; lower-neck and fore part of breast and 

 back black ; back and wing-coverts greyish-white, finely 

 undulated with dusky ; speculum and lower parts white. 



3. Fidigula cristata. Tufted Scaup-Duck. Bill greyish- 

 blue, with a terminal black band ; feathers of the head elon- 

 gated into a large decurved crest ; head and upper-neck 

 purplish-black ; back black, minutely dotted with white ; 

 speculum, breast, and sides, white. 



GENUS III. OIDEMIA. SCOTER. 



Bill nearly as long as the head, about the same height 

 and breadth at the base, becoming depressed and flattened 

 toward the end, which is rounded ; upper mandible with a 

 prominence at the base above, and a more extended enlarge- 

 ment on each side, the basal lateral sinuses very wide, the 

 sides at the base erect, the edges thin, concealing the ends of 

 the not very numerous lamellse, the unguis very large, broadly 

 elliptical, little convex, at the end decurved ; that of the 

 lower mandible very large, broadly elliptical ; legs very short ; 



