Morus serrator -- Australasian Gannet. Alternate name on piece: Sula australis [Australian gannet] Interesting sequence: Gould's sketch here, Richter's development at Gould items 1516 and 1520, and the published plate. Artist's name(s): Richter, Henry Constantine; Gould, John. Layout sketch by Gould, with perhaps a few lines added by Richter; a sketch of another form of one of the heads in the margin.