AVES. 73 



riorly : nostrils small, oval, a little before the base : tail 

 more or less acute, sometimes elongated. 



(1. ANAS.) Bill longer than the head, semicylindric at its origin, 

 depressed and very much dilated towards the tip; toraia fur- 

 nished with long pectinated lamellae, projecting far heyond the 

 margin : tail a little longer than the wings, of fourteen feathers, 

 moderately acute. 



(2. CHAULIODUS.) Bill the length of the head, of nearly equal 

 breadth throughout ; pectinated lamellae distinct, appearing be- 

 low the edge of the upper mandible : tail slightly lengthened ; 

 the two middle feathers pointed, and rather longer than the 

 others. 



(3. DAFILA.) Bill full as long as the head; the upper mandible of 

 equal breadth throughout; lamellae not projecting beyond the 

 margin : tail of sixteen feathers, elongated, acute. 



(4. BOSCHAS.) Bill as long as the head, of nearly equal breadth 

 throughout; the denticulations of the upper mandible scarcely 

 projecting beyond the margin : tail of sixteen feathers, mode- 

 rate, rather acute. 



92. MARECA. Bill shorter than the head, higher 

 than broad at the base, depressed and narrowing towards 

 the tip ; lamella? slightly projecting : nostrils small, oval, 

 a little before the base : tail of fourteen feathers, short, 

 acute. 



* 93. DENDRONESSA. Bill shorter than the head, as broad as 

 high at the base, towards the tip narrow and contracted : nostrils large, 

 pervious, submedial : head with an occipital crest : tertials ornamented : 

 tail of sixteen feathers, rounded. 



*** (FULIGULIN^E.) Hind toe with a lobated mem- 

 brane: tarsi compressed. 



94. SOMATERIA Bill swollen and elevated at the 



base, nearly straight, extending on the forehead, where it 

 is divided by an angular projection of feathers, narrow and 

 obtuse anteriorly, the nail strong and hooked ; tomia set 

 with coarse distant lamellae : nostrils small, oval, medial : 

 tail of fourteen feathers. 



95. OIDEMIA Bill short, broad, with an elevated 



tumour at the base, towards the tip much depressed and 

 flattened ; the nail obtuse and rounded, slightly deflected ; 

 lamellae coarse, widely set, scarcely projecting : nostrils 

 oval, submedial, elevated : tail short, graduated, acute. 



