In this latter species the lamellae are much coarser than in the shoveller, and are firmly attached to the sides of the mandible; they are only about fifty in number on each side, and do not project at all beneath the margin.

They are square-topped, and are edged with translucent, hardish tissue, as if for crushing food.

The edges of the lower mandible are crossed by numerous fine ridges, which project very little.

Although the beak is thus very inferior as a sifter to that of a shoveller, yet this bird, as every one knows, constantly uses it for this purpose.