Bill short, bulging, very strong, deeper than broad, convex above and
below; upper mandible cerate at the base, its outline decurved, the
sides convex, the edges sharp, with an angular process, the tip
trigonal, decurved, elongated, acute; lower mandible with the angle
short and wide, the tip thin-edged, rounded, or abrupt. Nostrils
basal, round, open, in the cere. Head very large; neck of moderate
length; body compact. Feet short and robust; tarsus short, scaly; toes
stout, the outer directed backwards, the third and fourth coherent at
the base. Claws stout, curved, acute. Plumage generally blended, but
firm. Wings and tail various. Tongue short, fleshy, rounded, or
emarginate; œsophagus wide, with a large crop; stomach small,
muscular; intestine of moderate length; cœca small; cloaca
globular.
GENUS I. CENTURUS, Kuhl. PARRAKEET.
Bill short, very strong, bulging; upper mandible with the dorsal line
decurved, the sides convex, the edges ascending at the base, then
direct, with a deep notch, the tip decurved, acute; lower mandible
very deep at the base, with the dorsal line convex and ascending, the
tip sharp-edged and truncate. The nostrils basal, round. Feet short,
stout; tarsus very short; toes of moderate length, stout; claws
strong, curved, acute. Plumage blended, compact on the wings, which
are long and pointed, with the second quill longest. Tail long,
cuneate.