Porphyrio porphyrio melanotus -- Purple Swamphen. Alternate name on piece: Porphyrio melanotus [Black-backed porphyrio] Sheet has been cut in half, separating the two birds, and taped together again. In the drawing the birds are both turned toward center line; in the published plate one has been reversed so that they both face in the same direction. Artist's name(s): Gould, John; Richter, Henry Constantine. Birds fairly well drawn, with a good deal of emphasis and detailing by Gould.