by William Swainson

“ In these birds, that part of the roof of the under mandible which projects beyond the lower, is generally thin, and always perfectly smooth: a weakness of structure which renders it impossible for these parrots to feed upon hard substances; and betrays their frugivorous and suctorial nature, by indications perceptible to every one. ”

“ Bill moderate, compressed, end of the upper mandible, within, entirely smooth; under mandible lengthened, conic; the tip entire. Legs stout; Tail moderate, rounded or graduated; the feathers broad, their tips obtuse. ”