Galloperdix bicalcarata -- Ceylon Spurfowl, Sri Lanka Spurfowl. Alternate name on piece: Galloperdix zeylonensis [Ceylon spur-fowl] Artist's name(s): Gould, John; Richter, Henry Constantine. Fairly advanced sketch by Richter, with color; corrections and overdrawing by Gould; marginal sketches of heads and feather patterns.