by William Swainson, Zoological Illustrations — Vol II. Pl… (1820)
“ Nares basales, laterales, ovatæ, parvæ, patulæ. Lingua—? Pedes mediocres, congrui. Digiti antici basi coadnati, laterales subæquales. Hallux digitum medium æquans. Illiger. Bill moderate, straight, acute, much compressed, and inversely curved; the top of the upper mandible being straight, and the edge of the lower ascending or recurved. Nostrils basal, lateral, oval, small, and covered by a naked membrane. Tongue—? Feet moderate, claws united at their base, the lateral ones nearly equal; the hind claw as long as the leg and the middle toe. ”
