and flanks drab, margined with paler, the flanks gradually becoming a rich seal-brown, broadly margined with white. The middle of the under parts are very pale whitish drab, gradually becoming white on abdomen and under tail-coverts. On the middle of the breast there is a black feather, with several others showing the dark pigment being thrown into them, while at the roots of most of the feathers on the sternum a dark colouring matter is making its appearance.
Anser paludosus, Strickl. Front view of bill.
This is very important indeed, as it indicates that during the breeding season the under parts may become black, a character quite unknown in the Bean-Goose. The upper wing-coverts are a dark bluish slate, gradually becoming rich hair-brown, broadly margined with dull white on the medians and first coverts. Primaries dark seal-brown, the rib white. Secondaries almost black, margined and fringed with dull white. Tertiaries rich seal-brown, very broadly margined with dull white; giving a very conspicuous appearance to the upper parts of the bird. Alulæ rather pale bluish slate. Axillars and under wing-coverts dark slate. At the bend of the
