Onychogalea unguifera -- Northern Nail-tail Wallaby. Alternate name on piece: Onychogalea unguifer [Nail-tailed kangaroo] Layout drawing, head of animal finished; drawing includes two views of the nail-toothed tail--these are included in the published plate; 2 notes on form; species name lettered as cutline: "Onithogalea[!] unguifer." Artist's name(s): Gould, John; Richter, Henry Constantine.